why schools should adopt adapt these gravity computer models

why schools should adopt adapt these gravity computer models?




Reasons for considering using these simulations include:

1. Developed with YJC, IJC, RVHS, AJC, SRJC, SAJC, NJC in level wide implementations or class level. 
2. Innergy MOEHQ GOLD award 2012 winner
3. Shared at 5th IPSG, 5th redesign pedagogy conference 2013 and multimedia in physics teaching and learning (MPTL18) conference 2013
4. Published in physics education journal
5. Free for anyone to use, remix and redistribute, licensed creative commons attribution.

And yes, I personally teach field vectors in place of field lines because field vectors (what you get with many equal distance compasses in an area ) is easier to produce in computers models and students can use this concept in daily lives better than field lines (I doubt anyone can compute field lines in their minds accurately).

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.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_Eratostheneswee.jar
author: timberlake and lookang

• Gravitational field Kepler's 3rd Law T^2/r^3=constant

• Gravitational field Kepler's 3rd Law T^2/r^3=constant @YJC 

version 20August 2013. http://weelookang.blogspot.com/2010/06/ejs-open-source-kepler-system-model-by.html
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

• Force between point masses
• Field of a point mass
• Field near to the surface of 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.dropbox.com/u/44365627/lookangEJSworkspace/exportarchived/ejs_users_sgeducation_lookang_gravityfield1.jar
author: lookang based on the works of fu-kwun hwang

• 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.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_GField_and_Potential_1D_v7wee.jar
for RVHS computers https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_EarthAndSatelite4.3.6.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

• 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/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

• 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.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_users_sgeducation_lookang_twopointmass06.jar
author: fu-kwun hwang and lookang

• Gravitational Earth Projectile Orbit Newton's Mountain 

http://weelookang.blogspot.sg/2013/06/newtons-mountain-simulation-enhanced.html
http://weelookang.blogspot.sg/2011/05/ejs-open-source-newtons-mountain.html
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.
https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejs_NewtonsMountainwee06.jar
author: timberlake, lookang and fu-kwun hwang 

http://weelookang.blogspot.sg/2011/05/ejs-open-source-newtons-mountain.html
white out background for inserting  pictures into tutorials with y = 4.23E07 m and vi = 3070.98 m/s
https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_NewtonsMountainwee.jar
author: timberlake and lookang

• Geostationary Orbits of Satellite & Earth

version 18 April 2013 with added input zoom field and keyboard shift+mouse to zoom works again
http://weelookang.blogspot.sg/2010/07/ejs-open-source-geostationary-satellite.html
author: lookang based on the works of paco
https://dl.dropbox.com/u/44365627/lookangEJSworkspace/export/ejs_EarthAndSatelite.jar
worksheets by (lead) YJC: same link of four simulations https://www.dropbox.com/s/53vztw6meupn4r5/GravitationYJC.zip