[quote author=Fu-Kwun Hwang link=topic=197.msg823#msg823 date=1118134616]
This applet simulate many particles slide down at different angle.

[/quote]

How does this show the concept of Energy conservation: potential/kinetic energy ?

with some explanation i should be able to make creative common it into something that schools can get students to explore themselves  :)

For your consideration  ;)