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Physics Applets Virtual Lab

Google Supercharges Blogger With Dynamic Views, ready to go?

Ways to open and use files here

for *.jar files, need Java runtime https://java.com/en/download/
for *.trz files, need Tracker https://www.cabrillo.edu/~dbrown/tracker/
for *.html files, which i assume are JavaScript models, just need a modern browser like Chrome.


Alternative Libraries

  1. http://iwant2study.org/lookangejss/ probably the best 
  2. https://www.dropbox.com/sh/6tphscl4rfos7wa/QmMHG3ctAb/lookangEJSworkspace/export
  3. https://www.dropbox.com/sh/6tphscl4rfos7wa/RavYrB0J6Q/lookangEJSS/export 2014 new!

other sources are:

  1. http://ltlphysics.blogspot.sg/p/simulation.html by Lee Tat Leong 
  2. http://iwant2study.org/sharing/?p=570 by Lye Sze Yee

A new page in preparation of the blogger dynamic view

This list is the newly updated as of 29 August 2012 onwards

http://tinyurl.com/ejsssg

New! 2013 mirrored into dropbox
you can download all my simulations here






Physics Virtual Lab created mostly using Easy Java Simulation


  1. MEASUREMENT Physical Quantities: Time pendulum

      Ejs Open Source Real Pendulum Model java applet
      version with updated features like theory period, force diagram, energy bars, drag model, reference potential energy, number of complete oscillation counter etc
      http://weelookang.blogspot.com/2010/06/physical-quantities-and-units.html
      https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Pendulumwee.jar
      https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_Pendulumwee.jar
      author: Wolfgang Christian and F. Esquembre and lookang
  2. MEASUREMENT Physical Quantities: Time Pendulum for Primary School

    http://weelookang.blogspot.com/2012/02/primary-school-remix-for-pendulum.html
    Primary School remix for Pendulum by mr.matt.hatter@gmail.com
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_matthatterPendulumweemat03.jar
    https://sites.google.com/site/perfectodemolito/simulation
    Author: Wolfgang Christian and F. Esquembre http://www.compadre.org/osp/items/detail.cfm?ID=7567
    Author: lookang (remix version) http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=818.0
    Author: W. Christian, F. Esquembre , lookang and mr.matt.hatter@gmail.com (this primary school version)


  3. MEASUREMENT Physical Quantities: 15 Pendulum uncoupled for amazing wave effect
    http://weelookang.blogspot.sg/2012/04/ejs-open-source-fifteen-uncoupled.html
    Ejs Open Source Fifteen uncoupled simple pendulums model
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_pendulum3D.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_pendulum3D.jar
    Author: lookang based on the works of http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2428.0

  4. MEASUREMENT Physical Quantities: Stop Watch

    Ejs Open Source Stop Watch Model Java Applet with enhanced integer values for game and minute/second hands
    http://weelookang.blogspot.sg/2011/08/ejs-open-source-stop-watch-model.html

    https://dl.dropboxusercontent.com/u/44365627/lookangejss/export/ejs_model_Stopwatchmagnifywee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Stopwatchmagnifywee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_Stopwatchmagnifywee.jar
    author: dhasthagheer, added on by Fu-Kwun Hwang, and now slightly remixed by lookang


  5. MEASUREMENT Physical Quantities: Stop Watch 2
    Ejs Open Source Stop Watch and Timer Model Java Applet with enhanced integer values for game and minute/second hands
    http://weelookang.blogspot.sg/2011/08/ejs-open-source-stop-watch-model.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Stopwatchmagnifywee02.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_Stopwatchmagnifywee02.jar
    author: dhasthagheer, added on by Fu-Kwun Hwang, and now slightly remixed by lookang

  6. MEASUREMENT Physical Quantities: Clock 12 hour & 24 hour

    Ejs Open Source Real Clock Model Java Applet by Fu-Kwun Hwang remixed by lookang
    http://weelookang.blogspot.sg/2011/08/ejs-open-source-real-clock-model-java.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_clock24wee01.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_clock24wee01.jar
    author: Fu-Kwun Hwang remixed by lookang
  7. MEASUREMENT Physical Quantities: Cathode Ray Oscilloscope

    Ejs Open Source Cathode Ray Oscilloscope CRO Java Applet remixed version and bug fixed!
    http://weelookang.blogspot.sg/2012/10/ejs-open-source-cathode-ray.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_oscilloscopewee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_oscilloscopewee.jar
    Author: Fu-Kwun and lookang (this remix version)
  8. MEASUREMENT Physical Quantities: Vernier Callipers
    31 October 2011 added magnify and random length objects to challenge students to think more, hopefully more fun to figure out for themselves!
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-vernier-calipers-java.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_AAPTVernierCaliper.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_AAPTVernierCaliper.jar
    author: Fu-Kwun and lookang (this remix version)

  9. MEASUREMENT Physical Quantities: Micrometer

    added ability to magnify and a randomize object width
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-micrometer-java-applet.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Micrometer02.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_Micrometer02.jar
    authors: Fu-Kwun and lookang and wolfgang
  10. Scalars and Vectors: Represent vector of horizontal and vertical components

    Author: lookang and Fu-Kwun

  11. Scalars and Vectors: Magnitude of a Vector
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-creative-commons-sg.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_magnitudeofavector03.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_magnitudeofavector03.jar
    Author: lookang

  12. Scalars and Vectors: Resolving a Vector in 2 Perpendicular Directions
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-java-applet-resolving.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_sinecosinewee03.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_sinecosinewee03.jar
    Author: Fu-Kwun and lookang

  13. Scalars and Vectors: Vector Addition by Graphical Method

    Author: Fu-Kwun and lookang

  14. Newtonian Mechanics: Ticker Tape Timer
    7. Ticker Tape Timer
    http://weelookang.blogspot.sg/2013/04/primary-school-simulations-by-engrg1.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_TickerTapeV2.jar
    https://dl.dropbox.com/u/24511248/JaveEJS/ejs_TickerTapeV2.jar
    http://iwant2study.org/sharing/?p=570
    author: engrg1

  15. Newtonian Mechanics: Kinematics of 1 object Horizontally

  16. Newtonian Mechanics: Kinematics Model(EJSS)


    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_kinematics/kinematics_Simulation.html
    source: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_src_kinematics.zip
    EJSS Kinematics Model by lookang, based on models and ideas from Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni authors: lookang, Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni 
  17. Newtonian Mechanics: Kinematics of 1 object Horizontally (Phet the moving man)

    The Moving Man
    click to run PheT appet
    (abandon attempt) Ejs Open Source Position, velocity, and acceleration graphs
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_position.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_position.jar
    author: lookang

  18. Newtonian Mechanics: Kinematics of Ferrari Real Life Application (Tracker)

    http://weelookang.blogspot.sg/2012/05/what-evidence-of-speed-ferrari-was.html
    updated with inputs on length of FERRARI car travel to be 13.0± 1 m with table of data showing 9 frames ending at time t = 0.30 s
    author: lookang and darren for useful discussion
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/TrackerFerrari/ferrari.trz
  19. Newtonian Mechanics: Kinematics of a Ball Bouncing Vertically (Tracker)

    http://weelookang.blogspot.sg/2014/01/tracker-ball-toss-up.html
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/bosstossup.trz
    author: tracker and video by douglas brown, model by lookang vy = 3.94 and fy = 2*-4.837, where numbers are determined by analysis of trend fitting curves coefficients


  20. Newtonian Mechanics: Bouncing Ball (Tracker)

    http://www.opensourcephysics.org/items/detail.cfm?ID=11705
    added kinetic model if y = if (t < 0.68, -4.781*t^2+0.124*t+0.001, if(t < 1.48,-5.117*t^2+10.989*t-7.147,if(t < 2.04,-4.855*t^2+17.059*t-16.669,if(t < 2.44,-4.886*t^2+21.867*t-26.337,if(t < 2.78,-4.174*t^2+21.682*t-30.138,0)))))
    http://weelookang.blogspot.sg/2012/11/tracker-modeling-in-bouncing-ball.html
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20ETD/ballbouncelookang01_x264wee.trz
    worksheet: https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20ETD/bouncing%20ball%20worksheet%20tracker%20lookangv4answerkeyupdated4.61.docx
    author: lookang
  21. Newtonian Mechanics: Bouncing Ball filmed Horizontally (Tracker)

    by natashataiqianhui

    http://weelookang.blogspot.sg/2014/04/tracker-natashataiqianhui-student-video.html
    bouncing ball video
    https://www.dropbox.com/s/vz3dbyvlvpe1m7s/natashataiqianhui_304_18_physicstrackerfamodel.trz
    author of video: natashataiqianhu, author of model: lookang (only for the first 3 bounces is added)
  22. Newtonian Mechanics: Falling with Light Damping (Tracker)

    Tracker Modeling in Light Damping in Shuttle Cock compare to ball: Model BALL is fy = -5.161*2 with y0 = 4.057 and vy = 0.07
    http://weelookang.blogspot.sg/2012/08/tracker-modeling-in-light-damping-in.html
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/airresistanceshuttlecock/airresistanceshuttlecock.trz
    author: jitning and lookang
  23. Newtonian Mechanics: Free Fall Model (EJSS)



    EJSS Free Fall Model by lookang, based on models and ideas from Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni
    authors: lookang, Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni
  24. Newtonian Mechanics: Kinematics in Y direction Model (EJSS)

    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_freefall01/freefall01_Simulation.html
    source: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_src_freefall01.zip
    EJSS Kinematics in Y direction Model by lookang, based on models and ideas from Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni
    authors: lookang, Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni
    author of EJS 5: Paco.

  25. Newtonian Mechanics: Kinematics of a Car, Traffic Light and Reaction Time
    http://weelookang.blogspot.com/2011/10/ejs-open-source-reaction-time.html
    Ejs Open Source Reaction Time Measurement Traffic Light Model Java Applet
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_reactionTimewee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_reactionTimewee.jar
    authors:Fu-Kwun Hwang this version remixed by lookang

  26. Newtonian Mechanics: Projectile Motion Primary School

    http://weelookang.blogspot.sg/2014/05/ejss-projectile-motion-model-for.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_projectile/projectile_Simulation.html
    source: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_src_projectile.zip
    authors: lookang
    author of EJS 5: Paco.
  27. Newtonian Mechanics: Projectile Motion With and Without Air Resistance

    Projectile Motion (with/without air resistance)
    http://weelookang.blogspot.com/2010/06/ejs-open-source-creative-commons.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Projectile02.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_Projectile02.jar
    author: lookang based on the works of paco
    worksheet by
    RVHS (lead): https://www.dropbox.com/s/6tv1twkc5u92pb2/P04%20EduLabs%20%28tr%29%20v2wee.doc

  28. Newtonian Mechanics: Projectile (Tracker)

    http://weelookang.blogspot.com/2011/03/tracker-scaling-in-yishun-junior.html
    lesson by lookang and jimmy
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20YJC%20PWS5%20IT/projectilemotion.trz
    author: doug brown video, lookang and jimmy model and worksheet
  29. Newtonian Mechanics: Projectile Motion With Video Modelled

    EJS parabolic throw with video model
    http://weelookang.blogspot.com/2014/07/ejs-parabolic-throw-with-video-model.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/lookangejss/02_newtonianmechanics_3dynamics/ejs/ejs_model_ParabolicThrowWithVideowee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/lookangejss/02_newtonianmechanics_3dynamics/ejs/ejs_src_ParabolicThrowWithVideowee.zip
    author: paco and lookang
    author of video: doug

  30. Newtonian Mechanics: Projectile Motion With and Without Air Resistance

    From the video tracked, the jumper takes off at 25 degree.
    Tracker Standing Broad Jump
    http://weelookang.blogspot.sg/2013/04/tracker-standing-broad-jump.html
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/NelsonZhangDiPriPE/broadjump.trz
    author: lookang, video by nelson and teacher in zhangdipri
  31. Newtonian Mechanics: Rectilinear Motion of 2 Objects Racing

    http://weelookang.blogspot.sg/2010/06/ejs-open-source-java-applet.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_catanddog.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/exportarchived/ejs_catanddog.jar
    author: fu kwun and lookang

  32. Newtonian Mechanics: Position vs Time Graph (EJSS)


    author: Andreu Glasmann, Wolfgang Christian, and Mario Belloni, lookang (this version)

  33. Newtonian Mechanics: 2D Elastic Collision

    http://weelookang.blogspot.sg/2011/05/ejs-open-source-2d-collision-model-java.html
    http://weelookang.blogspot.sg/2014/05/ejs-2d-collision-with-angles.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_ElasticCollisionwee.jar
    older https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_ElasticCollision.jar
    author: Fu-Kwun Hwang, edited by Wolfgang Christian and Robert Mohr very slightly edited by lookang

  34. Newtonian Mechanics: 1D Elastic Collision

    One Dimension Collision JS Model
    author: lookang
    Online: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_Momentum1D01/Momentum1D01_Simulation.html
    Download: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_Momentum1D01.zip


  35. Newtonian Mechanics: 1D Elastic Collision 

    EJS 1D collision model with virtual spring modelhttp://weelookang.blogspot.sg/2014/07/ejs-1d-collision-model-with-virtual.html
    author: Fu-Kwun Hwang and lookang
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/lookangejss/02_newtonianmechanics_3dynamics/ejs/ejs_model_collisionwee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/lookangejss/02_newtonianmechanics_3dynamics/ejs/ejs_src_collisionwee.zip
  36. Dynamics: Tracker Video Analysis on Elastic Collision (Tracker)
    Tracker video analysis and model on elastic collision.
    video by Joel A. Bryan http://jabryan.iweb.bsu.edu/videoanalysis/index.htm
    for more video go to Video Analysis: Real World Investigations for Physics and Mathematics by Joel A. Bryan.
    model by lookang 
    Model B: if(t<0.5, 0.673*t, 0.02*(t-0.5)+0.34)
    Model C: if(t>0.5,0.586*(t)+0.223,0.5)

    http://weelookang.blogspot.sg/2014/04/tracker-video-analysis-and-model-on.html
    Tracker video analysis and model on elastic collision.
    video by Joel A. Bryan http://jabryan.iweb.bsu.edu/videoanalysis/index.htm
    model by lookang
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20RVHS/elastici.trz
    Model B: if(t<0.5, 0.673*t, 0.02*(t-0.5)+0.34)
    Model C: if(t>0.5,0.586*(t)+0.223,0.5)

    As a response to Samuel's question, we did this in 2010 as a tracker analysis for RVHS students and we speculate model building strengthens learning.

    enjoy!

  37. Dynamics: 1 Direction Collision Force Model

    thanks to mr yip's feedback, a bug (solver defaulted to Euler instead of  Runge-kutta 4) was removed.

    some of useful features include

    for an expanded view or close up view of the F-t graph, move the carts by dragging on the carts near to the right side of the world view, as the plot detects the Tmax for simulation to run.

    collision cart, showing ideal e=0 and smaller view space xmin=0 and xmax=1
    http://weelookang.blogspot.sg/2014/04/ejs-dynamics-1-direction-collision.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_Momentum1DForceModel09.jar
    author: lookang, paco and engrg1
    worksheets by
    (lead) AJC: https://www.dropbox.com/s/5obo5awn3w3zrgr/CollsionCartsAJC.zip
    (lead) RVHS: https://www.dropbox.com/s/8bq51hqa1jsjcvn/CollsionCartsRVHS.zip
    IJC https://www.dropbox.com/s/ztwc4pkvtc7ho50/CollisoncartsIJC.zip
    SRJC: https://www.dropbox.com/s/m4yrerc97fgesn2/CollisioncartsSRJC.zip
    YJC: https://www.dropbox.com/s/uguy3ewndj0pqxr/CollisionCartsYJC2013.zip
  38. Dynamics: Inelastic Collision of 2 Marbles on a Horizontal Track

    helping leongster to mentor students in becoming like scientists!


    http://weelookang.blogspot.sg/2014/04/tracker-inleastic-collision-of-2.html
    video by valary lim, kinematics model by lookang
    1. explain why the model A is written as x = if(t<0.333,0.60*t,if(t>0.333,0.1998+0.15*(t-0.333),0))
    2. explain why model B is written as x = if(t<0.333,0.205,0.205+0.44*(t-0.333+0.0333))
    https://www.dropbox.com/s/4ypouk5hgc69hww/304-307valarylimmarble_analysisandmodel.trz
  39. Dynamics: Newton's Laws of Motion 1st Law
    http://weelookang.blogspot.sg/2010/06/open-source-ejs-newtons-first-law-java.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_FirstLawtrywee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/exportarchived/ejs_users_sgeducation_lookang_FirstLawtrywee.jar
    author: woflgang and lookang

  40. Dynamics: Newton's Laws of Motion 2nd Law


    Open Source Rocket Physics Java Applet Model by lookang, based on assignment given by Larry Engelhardt http://www.compadre.org/osp/items/detail.cfm?ID=11294
    author: Larry Engelhardt and assignment completed by lookang 

  41. Dynamics: Basic Rocket Model (EJSS)



    Basic Rocket JS Model
    author: Larry Engelhardt and lookang (this JS model)
  42. Dynamics: Modified Atwood Machine by Tat Leong

    Ejs Open Source Modified Atwood Machine Model Java Applet
    http://weelookang.blogspot.sg/2013/04/ejs-open-source-modified-atwood-machine.html
    http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2700.msg9920#msg9920
    author: Lee Tat Leong ,remixed by lookang
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_AtwoodMachine2wee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_AtwoodMachine2wee.jar

  43. Dynamics: Rolling Down a Track (Tracker)

    http://weelookang.blogspot.sg/2013/08/toy-car-rolling-down-slope-by-ooi.html
    Tracker Modeling in toy car rolling down a slope is fx = -g*sin(θ), vx0 = 1.478 where g = 2*4.866 (from data analysis of x versus t and quadratic fit, coefficient A = 4.866) vx0 = 1.478 (from data analysis of vx versus t linear fit B = 1.478)
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/TrackerNJC/toycarslope.trz
    author: Ooi Junwei, Samuel video and lookang model
  44. Dynamics: Rolling Down a Gentle Slope First (Tracker)

    http://weelookang.blogspot.sg/2013/08/toy-car-rolling-down-steep-and-gentle.html
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/TrackerNJC/toycargentleslopefirst.trz
    author: Ooi Junwei, Samuel video, analysis lookang
  45. Dynamics: Rolling Down a Steep Slope First (Tracker)

    http://weelookang.blogspot.sg/2013/08/toy-car-rolling-down-steep-and-gentle.html
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/TrackerNJC/toycarsteepslopefirst.trz
    author: Ooi Junwei, Samuel video, analysis lookang
  46. Dynamics: Plastic Rod Rolling Down a V-shaped Rail (Tracker)

    Tracker Modeling in plastic rod rolling down a slope Model is x = -0.157*t^2-0.04*t and y = -0.0085*t^2-0.0035*t+0.043 with pe potential energy defined as pe = m*g*h and te = pe +K
    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-plastic-rod-rolling.html
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20ETDAST/rodrollingdown.trz
  47. Dynamics: EJSS Static and Kinetic Friction on Inclined Plane ModelEJSS Static and Kinetic Friction on Incline Plane Model

    reference:
    1. EJS Static and Kinetic Friction on Incline Plane Model by Francisco Esquembre and lookang http://weelookang.blogspot.sg/2014/04/ejs-static-and-kinetic-friction-on.html
    2. Sliding Down an Incline Plane Model by Francisco Esquembre http://www.compadre.org/osp/items/detail.cfm?ID=9973

  48. Dynamics: EJS Static and Kinetic Friction on Inclined Plane Model
    EJS Static and Kinetic Friction on Incline Plane Model

    reference:
    1. Sliding Down an Incline Plane Model by Francisco Esquembre http://www.compadre.org/osp/items/detail.cfm?ID=9973

    EJS Static and Kinetic Friction on Incline Plane Model
    http://weelookang.blogspot.sg/2014/04/ejs-static-and-kinetic-friction-on.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_SlidingDownAnInclinedPlanewee.jar
    author: Francisco Esquembre and remixed by lookang

  49. Dynamics: Wooden Rod Rolling Down a V-shaped Rail (Tracker)

    Tracker Modeling in in wooden rod rolling down a slope Model is x = -0.11*t^2-0.03*t and y = -0.006*t^2+0.0355 with pe potential energy defined as pe = m*g*h and te = pe +K
    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-wooden-rod-rolling.html
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20ETDAST/woodenrodrollingdown.trz
    author: lookang
  50. Dynamics: Plastic Double Cone rolling Down a V-shaped Rail (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-double-cone-rolling.html
    Tracker Modeling in in double cone rolling up a slope Model is x = 0.176*t-0 and y = 0.0064*t^2-0.0145*t+0.055 with pe potential energy defined as pe = m*g*h and te = pe +K
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20ETDAST/doubleconerollingdown.trz
  51. Dynamics: Wooden Double Cone rolling Down a V-shaped Rail (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-wooden-double-cone.html
    Tracker Modeling in in wooden double cone rolling up a slope Model is x = 0.176*t+0.105 and y = 0.006*t^2-0.013*t+0.053 with pe potential energy defined as pe = m*g*h and te = pe +K
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20ETDAST/doubleconerollingdownwooden.trz
  52. Dynamics: Rolling Down a Slope

    a car rolling down a slope and colliding with bumper with coefficient of restitution e = 0.2
    http://weelookang.blogspot.com/2010/06/ejs-open-source-multi-objects-rolling.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Car6web.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_Car6web.jar
    author:Ejs Open Source Rocket Car on an Inclined Plane Java Applet is by Wolfgang Christian, Francisco Esquembre, and Mario Belloni using the Easy Java Simulations (Ejs) modeling tool, now remixed by lookang

  53. Dynamics: Block Moving on a Horizontal Plane with Friction


    Ejs Open Source Frictional Mass Block moving on Horizontal Plane Java Applet by Fu-Kwun Hwang, remixed by lookang
    author:Fu-Kwun Hwang, remixed by lookang

  54. Dynamics: Sphere Rolling Without Slipping
    http://weelookang.blogspot.sg/2010/09/ejs-open-source-rolling-solid-hollow.html
    Ejs Open Source Rolling Solid & Hollow Sphere with Slipping java applet
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_rotateDiskwee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_rotateDiskwee.jar
    author: Hwang Fu Kwun and lookang

  55. Dynamics: Point Mass moving on a curve

    EJS Particle Motion On A Curve Model by Wolfgang Christian
    http://weelookang.blogspot.sg/2014/03/ejs-particle-motion-on-curve-model.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_ParticleMotionOnCurvewee.jar
    author: Wolfgang Christian, slightly edited this version by lookang

  56. Energy: Energy Conversion and Conservation of a Roller Coaster
    15 june 2011 version with a circular loop, have not implemented the drag coefficient k yet. :)
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-roller-coaster-physics.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_weeRollerCoaster07.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_Roller_weeRollerCoaster07.jar
    author: mike gallis, remixed by lookang

  57. Ejs Open Source Circular Loop Vertical Motion java applet with mass point align on the track for ease of calculation for minimum speed of v=2.5rfor completing circular motion reduce δt=0.05 for stepping almost to top of the loop.
    http://weelookang.blogspot.com/2011/09/ejs-open-source-circular-loop-vertical.html
    with top 90 degree https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_coaster9wee.jar
    with linear track https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_coaster7wee.jar
    theoretical H https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_coaster5wee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_coaster3wee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_coaster3wee.jar
    author: Fu-Kwun Hwang and lookang



  58. Circular Motion: Energy Conversion and Conservation of a vertical circular rod motion

    picture of vertical circular motion by selecting g = 9.81 m/s^2
    http://weelookang.blogspot.com/2010/07/ejs-open-source-vertical-circular.html
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_circularvwee03.jar
    author: fu-kwun hwang and lookang
  59. Circular Motion: Kinematics of Uniform Circular Motion
    Ejs Open Source Uniform Circular Motion Derivation of a = v^2
    /r
    http://weelookang.blogspot.sg/2010/07/ejs-open-source-uniform-circular-motion.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_circularmotionwee02.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_circularmotionwee02.jar
    author: fu-kwun hwang and lookang

  60. Circular Motion: Fan (Tracker)

    Tracker Modeling in Uniform Circular Motion of Fan: Model is fr = -w*w*r where r0 = 0.358 m, θ0 = 124.3 deg, w0 = 236.0 deg/s
    http://weelookang.blogspot.sg/2012/08/tracker-modeling-in-uniform-circular.html
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/circularmotion%20fan/uniformcircularmotionfan.trz
    author: lookang for model, jitning for video
  61. Gravitational Field: How to Measure Radius of Earth by Eratosthenes
    Ejs Open Source Eratosthenes Measures Earth Java Applet by Todd Timberlake, remixed by lookang, version public domain earth from Tom Patterson, www.shadedrelief.com. Thanks Todd and Tom!
    http://weelookang.blogspot.sg/2012/06/ejs-open-source-eratosthenes-measures.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Eratostheneswee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_Eratostheneswee.jar
    author: timberlake and lookang

  62. Gravitational Field: Kepler's 3rd Law (T^2/r^3=constant)
    version 20August 2013. http://weelookang.blogspot.com/2010/06/ejs-open-source-kepler-system-model-by.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_KeplerSystem3rdLaw09.jar
    prototype: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_KeplerSystem3rdLaw09.jar
    older version:https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_KeplerSystem3rdLaw03.jar
    author: timberlake and lookang
    worksheets by (lead) YJC: same link of four simulations https://www.dropbox.com/s/53vztw6meupn4r5/GravitationYJC.zip
    https://www.dropbox.com/s/7ng3brk1h48f7tf/GravitationYJC2013.zip
    scaling IJC: https://dl.dropboxusercontent.com/u/44365627/eduLabJava2012-2013/Gravity/GravitationIJC2013.zip

  63. Gravitational Field: Field near to the Earth
    http://weelookang.blogspot.sg/2010/10/ejs-open-source-gravity-field-model.html
    Ejs Open Source Gravity Field Model Near Earth Java Applet
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_gravityfield.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/exportarchived/ejs_users_sgeducation_lookang_gravityfield1.jar
    author: lookang based on the works of fu-kwun hwang

  64. Gravitational Field: Gravitational Potential 1 Dimension
    added g proportional to r inside sphere of constant density as suggested by tatleong. re-implemented dotted lines of g1 g2 and phi1 and phi2 with no lag after using the group to contain them.
    http://weelookang.blogspot.sg/2010/08/ejs-open-source-gravitational-field.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_GFieldMass.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_GField_and_Potential_1D_v8wee_unsigned.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_GField_and_Potential_1D_v7wee.jar
    author: lookang and andrew based on andrew duffy early model
    worksheets by (lead) YJC: same link of four simulations
    https://www.dropbox.com/s/53vztw6meupn4r5/GravitationYJC.zip
    https://www.dropbox.com/s/7ng3brk1h48f7tf/GravitationYJC2013.zip
    scaling IJC: https://dl.dropboxusercontent.com/u/44365627/eduLabJava2012-2013/Gravity/GravitationIJC2013.zip

  65. Gravitational Field: Gravitational potential 1 Dimension Earth & Moon Real Data
    version April 30 2013 http://weelookang.blogspot.sg/2010/08/ejs-open-source-gravitational-field_10.html
    picture of computer model of Earth and Moon gravity system,
    added white background option for printing on lecture notes, fixed bug of g2 showing, latex for g and phi,menu for Earth Moon configuration instead of just Moon Earth previously
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_EarthMoon.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_EarthMoon.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_GFieldandPotential1Dv7EarthMoon.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_GFieldandPotential1Dv7EarthMoon.jar
    author: lookang and andrew based on andrew duffy early model
    worksheets by (lead) YJC: same link of four simulations
     https://www.dropbox.com/s/53vztw6meupn4r5/GravitationYJC.zip
    https://www.dropbox.com/s/7ng3brk1h48f7tf/GravitationYJC2013.zip
    scaling IJC: https://dl.dropboxusercontent.com/u/44365627/eduLabJava2012-2013/Gravity/GravitationIJC2013.zip

  66. Gravitational Field: Gravitational Field Vector, Field Lines, Potential in 2 Dimensions

    Ejs Open Source 2 Mass Model with Gravity Field Vector, Field Lines, Potential updated 06 sept 2011 with potential and field strength values
    http://weelookang.blogspot.sg/2011/09/ejs-open-source-2-mass-model-with.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_twopointmass06.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_twopointmass06.jar
    author: fu-kwun hwang and lookang

  67. Gravitational Field: Gravitational Earth Projectile Orbit Newton's Mountain


    added ability to fire to add velocity to a achieve eclipse orbit and select circular to achieve circular orbit by applying impulse in directions to get velocity at the correct speed and direction, perpendicular to radius. this feature helps in the learning of energies change as satellite move from one circular orbit to another circular as requested by soo kok.
    author: timberlake, lookang and fu-kwun hwang

  68. Gravitational Field: Earth and Moon(EJSS)


  69. Oscillations: Vertical Spring Mass System (Tracker)

    Tracker Modeling in Pendulum as Spring mass system: Model is fy = -w*w*y where w = 3.136 with vy0 = 9.20E-2 and w = 5.795
    http://weelookang.blogspot.sg/2012/08/tracker-modeling-in-spring-mass-system.html
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/springmassystem/springmass.trz
    author: lookang model, jitning video
  70. Oscillations: Oscillator Chain Model (EJSS)

  71. SHM & Circular motionResonance
    http://weelookang.blogspot.com/2010/06/ejs-open-source-java-applet-resonance.html
    Ejs open source java applet Resonance simple harmonic motion SHM
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_weelookangresonance09moe.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_weelookangresonance09moe.jar
    author: lookang based on the works of prof paco

  72. SHM: Pendulum Light Damping (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-pendulum.html
    Tracker Modeling in Pendulum as SHM single swing: Model is fx = -w*w*x where w = 3.136 with x0 = 1.90E-2 and vx = -0.14
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/Pendulum/Pendulum%28Single%29lookang.trz
    author: lookang model and jitning video
  73. SHM: Pendulum Model as SHM (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-pendulum.html
    Tracker Modeling in Pendulum as SHM : Model is fx = -w*w*x where w = 3.724 with x0 = 4.60E-2 and vx = 0
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/Pendulum/Pendulum%28SHM%29lookang.trz
    author: lookang model and jitning video
  74. SHM: Pendulum in Phase (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-pendulum.html
    Tracker Modeling in 2 Pendulum swinging in phase Model1 x = 0.049*sin(3.378*t+0.018)
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/Pendulum/Pendulum_1inPhaselookang.trz
    author: lookang model and jitning video
  75. SHM: Pendulum in anti phase (tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-pendulum.html
    Tracker Modeling in 2 Pendulum swinging in anti-phase ModelA: x = 0.072*sin(3.348*t+3.158)
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/Pendulum/Pendulum_2antiphaselookang.trz
    author: lookang model, jitning video
  76. SHM: Pendulum Out of Phase (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-pendulum.html
    Tracker Modeling in 2 Pendulum swinging in out of phase ModelA: x = 0.032*sin(3.338*t+3.048)
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/Pendulum/Pendulum_outofPhase%28Analysis%29lookang.trz
    author: lookang model, jitning video
  77. SHM: Pendulum Ping Pong Ball in Damping (Tracker)

    http://weelookang.blogspot.sg/2012/07/tracker-modeling-in-pendulum.html
    Tracker Modeling in Light Damping in Ping Pong ball as Pendulum with modeling builder used for exponentialdecay = A*sin(w*t-pi)*e^(1-k*t) , with evidence of A = 0.022, w = 3.052 and k = 0.036
    https://dl.dropbox.com/u/44365627/TrackerDigitalLibrarySG/Tracker%20HCI%20JitNing%202012%20Sharing%20with%20Beginning%20Teachers/Pendulum/Ping%20Pong%20%28SHM%29lookang.trz
    author: lookang model, jitning video
  78. Thermal Physics: Particle model for solid liquid gas states
    http://weelookang.blogspot.sg/2010/06/particle-model-for-solid-liquid-gas.html
    Particle model for solid liquid gas states by Fu-Kwun Hwang
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_solidliquidgaswee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_solidliquidgaswee.jar
    author: Fu-Kwun Hwang and lookang

  79. Thermal Physics: Heat capacity and Specific heat capacity of cylinder block 
    screenshot of Ejs Open Source Heat capacity and Specific heat capacity Java Applet by lookang, customized based on an earlier model
    http://www.compadre.org/osp/items/detail.cfm?ID=10071
    http://weelookang.blogspot.sg/2012/08/ejs-open-source-heat-capacity-and.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_NewtonLawOfCoolingheatcapacitywee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_NewtonLawOfCoolingheatcapacitywee.jar
    author: Wolfgang Christian and lookang.

  80. Waves: General Wave Properties & Representations
    http://weelookang.blogspot.sg/2011/04/ejs-open-source-wave-representations.html
    Ejs Open Source Wave Representations Model Java Applet Simulation
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Wave_representations_v5.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_Wave_representations_v5.jar
    author: Andrew Duffy, remixed by lookang

  81. Waves: Progressive waves & Superposition

    http://weelookang.blogspot.com/2010/06/open-source-ejs-superposition-of-2.html
    added (1) autoscale x axis false, (2) -T/8 button (3) blue color for wave 2 for greater contrast on the projector screen thanks to joshua yeo.
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_WaveFunctionPlotterSuperpositionwee01.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_WaveFunctionPlotterSuperpositionwee01.jar
    author: wolfgang and lookang
    worksheets by (lead) SRJC:https://www.dropbox.com/s/uslrrrdkyq2puqe/WavesSRJC.zip

  82. Waves: Progressive waves & Superposition (EJSS)

    http://weelookang.blogspot.sg/2013/12/ejss-wave-1d-superposition-model.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_wave1d01/wave1d01_Simulation.html
    source: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_src_wave1d01.zip
    author: Wolfgang and lookang (this version)
  83. Waves: 3D Wave Machine 
    Ejs Open Source Wave Machine Model Java Applet
    http://weelookang.blogspot.sg/2012/08/ejs-open-source-wave-machine-model-java.html
    author: Wolfgang Christian, this remixed version is by lookang,
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_WaveMachinewee.jar
    https://dl.dropbox.com/u/44365627/lookangEworkspace/export/ejs_WaveMachinewee.jar
    customized to video here for inquiry http://www.nationalstemcentre.org.uk/elibrary/resource/2096/wave-machine

  84. Waves: Sound wave travel at v = 330 m/s application at fireworks
    Ejs Open Source Sound Travel FireWorks Model
    http://weelookang.blogspot.sg/2011/08/ejs-open-source-sound-travel-fireworks.html
    author: fu-kwun hwang and lookang
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_fireworkwee.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_fireworkwee.jar

  85. Waves: Doppler Effect sound Wave
    Ejs Open Source 1 Dimension Doppler Effect Sound Wave Java Applet with features like , counters for waves emitted and detected
    http://weelookang.blogspot.sg/2011/09/ejs-open-source-1-dimension-doppler.html
    author: lookang based on the works on Fu-Kwun Hwang, Juan M. Aguirregabiria and Andrew Duffy
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_dopplerxywee01.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_dopplerxywee01.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_dopplerxywee.jar

  86. Waves: Light and Shadow Model
    Light and Shadow Model with trick question.
    1 light source through a slit ( or 2 pink blocks) , notice the shadow-umbra and the light-bright light

    http://weelookang.blogspot.sg/2013/09/light-and-shadow-model-with-trick.html
    Ejs Open Source Light and Shadow Model java applet
    author andrew duffy, remixed by lookang
    from here http://www.compadre.org/osp/items/detail.cfm?ID=9983
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_light_and_shadowwee01.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_model_light_and_shadowwee01.jar

  87. Waves: Refraction of Light
    http://weelookang.blogspot.sg/2013/08/refraction-model.html
    Ejs Open Source Refraction Wave Model across 2 straight media java applet
    author fu-kwun hwang, remixed by lookang
    from here http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=152.0
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_twomediaspeedwee3.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_twomediaspeedwee3.jar

  88. Waves: Light and Lens Intensity Drops when Block
    Ejs Open Source Lens with light path block to show intensity drops shows intensity drops instead of part of the object is missing, a misconception that is probably partly due to the teaching of principal rays diagrams.
    http://weelookang.blogspot.sg/2012/10/ejs-open-source-lens-with-light-path.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_thinlensintensitywee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_thinlensintensitywee.jar
    author: fu-kwun kwang and remixed by lookang

  89. Waves: Thin lenses Light Lens
    bug fixed in convex len light travels in correct direction when image is virtual thanks to angela.teo@rgs.edu.sg
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-converging-diverging.html
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_ThinLenModel02.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_ThinLenModel02.jar
    author: lookang based on the works of fu-kwun hwang

  90. Waves: Light Snell's Law Refractive Index of Glass (Tracker)

    using video Snell's law of Refraction by QuantumBoffin , when i = 9.2 degree , r = 6.5 degree
    http://weelookang.blogspot.sg/2012/08/snells-law-of-refractive-index.html
    https://dl.dropboxusercontent.com/u/44365627/TrackerDigitalLibrarySG/TrackerQuantumBoffin/Snellslawrefractiveindex.trz
    author: tracker file lookang, video QuantumBoffin
  91. Waves: Electromagnetic wave


    Ejs Open Source Propagation of Electromagnetic Wave Model Java Applet updated with wavelength showing, different implementation axes possible, side view etc
    author: fu-kwun hwang and lookang

  92. Waves: Stationary waves in a pipe
    http://weelookang.blogspot.sg/2013/10/longitudinal-sound-wave-in-pipe-model.htm
    author: Juan Aguirregabiria and lookang (this remix version)
    Key features designed:
    1. Symbolic text to support visuals NAN, node, anti node node etc.
    2. Can simulate closed or open end of a pipe
    3. Microscopic visual of molecules enhanced with order and random position referencing tat leong codehttps://dl.dropbox.com/s/y8xsj6zx4xaqsur/ejs_longitudinal_waves_leetl_wee_v3.jar
    4. dt for slowing and speed up simulation 
    5. amplitudes for envelope of displacement visuals
    6. pressures for learning of real equipment sound detector to be placed at the maximum/minimum pressure from the ambient atmospheric as highlighted by kian wee
    7. inputs field for calculation of any length of pipe
    8. modelling-mathematical features as highlighted by peng poo and oon how as key to deepening learning

  93. Waves: Interference


    Ripple Tank Model (Wee, Duffy, Aguirregabiria, Hwang & Lee, 2012) with simplified physics equations modeled, realistic 2D and 3D (shown) visualizations, hints and scientific measurement tools for inquiry activities and data gathering for inquiry learning

  94. Waves: Diffraction grating


    Red Laser: Young Double and Multi Slits Java Applet Ejs Open Source Physics Computer Model
    author: Fu-Kwun Hwang, Robert Mohr, Wolfgang Christian and lookang, took some ideas from andrew duffy laser diffraction main view and tat leong point P,
    many thanks to fu-kwun hwang for teaching me so many things on NTNU java forum


    Blue Laser: Young Double Slit Java Applet Ejs Open Source Physics Computer Model
    http://weelookang.blogspot.sg/2013/06/ejs-open-source-young-double-slit-java.html
    author: andrew duffy and lookang, took some ideas from tat leong point P, Jose Ignacio Fernández Palop vcolor
    original work here http://www.compadre.org/osp/document/ServeFile.cfm?ID=9988&DocID=1622&Attachment=1
    many thanks to fu-kwun hwang for teaching me so many things on NTNU java forum
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_Diffraction_Interferencewee05.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_Diffraction_Interferencewee05.jar

  95.  Electricity and Magnetism: Force between point charges


    Coulomb Force Model
    author: Anne Cox, Francisco Esquembre, Wolfgang Christian and lookang (this version)


  96. Electricity and Magnetism: Magnetic fields due to currents ( DC Motor )

    http://weelookang.blogspot.sg/2010/06/ejs-open-source-direct-current.html
    Ejs Open Source Direct Current Electrical Motor Model Java Applet ( DC Motor ) « on: October 23, 2009, 06:14:56 PM » posted from:Singapore,,Singapore author: fu-kwun hwang and lookang
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_DCmotor10.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_DCmotor10.jar

  97. Electricity and Magnetism:  Electromagnetic Induction ( Falling Long Magnet through a Soleniod with AJC and RVHS )

    http://weelookang.blogspot.sg/2013/03/falling-magnet-through-coil-simulation.html
    falling magnet through coil simulation.
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_FallingMagnet11_4.3.0.jar
    https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_FallingMagnet11_4.3.0.jar
    author: paco, lookang,and engrg1
    worksheets by (lead) AJC: https://www.dropbox.com/s/a38tmxslprzmtkw/FallingMagnetAJC.zip
    RVHS: https://www.dropbox.com/s/siievhgeyihyxn8/FallingMagnetRVHS.zipRVHS: https://www.dropbox.com/s/ljnxqabi2gdgprd/FallingMagnetRVHS2013.zip
    SRJC: https://www.dropbox.com/s/0t2upmmlu0ltfoh/FallingMagnetSRJC.zipSRJC: https://www.dropbox.com/s/kbr5r06ba1i0wlv/FallingMagnetSRJC2013.zip

    OPTION added as request by HCI: bar magnet oscillating inside a solenoid java applet
    http://weelookang.blogspot.sg/2013/07/bar-magnet-oscillating-inside-solenoid.html
    falling magnet through coil simulation.
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_FallingMagnet13_4.3.0.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_FallingMagnet13_4.3.0.jar
    author: paco, lookang,and engrg1
    worksheets by (lead) AJC: https://www.dropbox.com/s/a38tmxslprzmtkw/FallingMagnetAJC.zip
    RVHS: https://www.dropbox.com/s/siievhgeyihyxn8/FallingMagnetRVHS.zip
    RVHS: https://www.dropbox.com/s/ljnxqabi2gdgprd/FallingMagnetRVHS2013.zip
    SRJC: https://www.dropbox.com/s/0t2upmmlu0ltfoh/FallingMagnetSRJC.zip
    SRJC: https://www.dropbox.com/s/kbr5r06ba1i0wlv/FallingMagnetSRJC2013.zip

  98. Quantum Theory of Light: Blackbody radiation

    Ejs Open source java applet Blackbody Radiation Spectrum Model for nm remixed by lookang from Fu-Kwun original and some codes adapted from lookang with some codes from Jose Ignacio Fernández Palop
    http://weelookang.blogspot.sg/2010/06/ejs-open-source-java-applet-blackbody.html
    author: fu-kwun hwang lookang and Jose Ignacio Fernández Palop
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_BlackbodyRadiationSpectrum.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_BlackbodyRadiationSpectrum.jar

  99. Matter Waves: Wave-particle duality

    Double Slit Wave-Particle Duality Model Open Source Physics Java Applet Wolfgang Christian
    notice the interference pattern suggesting wave like property in photon or electron
    when flux =1, the same pattern can be observed, suggesting that photon or electron interferes with itself as it passes through the aperture. Quantum Weirdness simulated by Prof Wolfgang!
    http://weelookang.blogspot.sg/2013/07/double-slit-wave-particle-duality-model.html
    author: Wolfgang Christian and lookang, took some ideas from andrew duffy laser diffraction
    original work here http://www.compadre.org/osp/items/detail.cfm?ID=11546
    many thanks to fu-kwun hwang for teaching me so many things on NTNU java forum
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSS/export/ejs_model_DoubleSlitWaveParticleDualitywee.jar
    https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_DoubleSlitWaveParticleDualitywee.jar

  100. PRIMARY SCIENCE: Cooling/Heating Simulation

    author: Wolfgang Christian remixed by engrg1 
    For teaching of Graphing Skill . 

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