PhET Progress Report

Sam Reid

March 22, 2007


An online version of this report is available here.

Here’s a pie chart representation of the time distribution.


Energy Skate Park

·         Replaced spline mechanics & physics

·         Added energy correction code for 1d case

·         Added 4th order Runge-Kutta

·         Doesn’t work correctly in spline coordinate frame?

·         Tests, Bugfixes, Cleanup

·         Don’t bother commenting on this intermediate version yet




  • Collaborated with Chris on bounded drag handlers.
  • Investigate PSwing issues.


Build Process

  •  Collaborated with John to improve simulation build process.
  • Wrote proguard scripts for use in build process.



·         Minor cleanup

·         Standardization, renaming, etc.


Upcoming Work

  1. Energy Skate Park

a.       Integrate new physics model into full simulation

1.      Most of the big things are done, lots of little things remain.

b.      Track should bump up when beneath ground

  1. Rotational Motion Simulation I/II
  2. Collaborate with John to improve simulation build process & isolate dependencies.
  3. Address Piccolo issue (with John).
  4. CCK…