Collision Physics  (2009-Sep-18 18:50 EDT)

by <>  (2010-Sep-03 7:42 EDT)

This is a fine example of Etoys, one that the ed team should consider for featuring. More description is needed though.

by <>  (2010-Sep-03 7:42 EDT)

very cool. just don't play with the gravity!

by <>  (2010-Sep-03 7:42 EDT)

hypnotic and aesthetically satisfying as well as instructive.

by <>  (2010-Sep-03 7:42 EDT)

I like how it runs automatically. This makes it quite self-explanatory, not needing instruction. I like how you can manipulate the gravity.

by <>  (2010-Sep-03 7:42 EDT)

I had fun moving the objects and the spinner around. I wanted to make the balls bouncier, as they quickly died and laid on the bottom of the bounding box. I clicked the down arrow on the friction spinner. Default went from 0.02 to -0.98 at which point the world freaked out and I think the app hung.

As an aside, it seems that "freaky behavior" is the norm for many etoys project with a spinner to control some numeric. Is there a problem with the control?