oic...........

[quote]ketotal=0; // add this[/quote]

at the beginning of the loop statement....thanks!!

i managed to add the kinetic, potential n total energy


to do list:
1. i will try to add a simple way for the balls to be draggable, along the arc of the rotation.
2. i will then try to add a logic statement for dragging other balls.

this guy's flash is amazingly simple
http://www.flashkit.com/movies/Scripting/Physics/Newtons-Bryan_He-9109/index.php