Coefficient of Restitution?

[BMcN]

Whats the equation for the coefficient of restitution again? Went blank!

[lavalamp]

Coefficient of Restitution = Speed of Separation = v1-v2
------------------- -----
Speed of Approach u1-u2

[Doc Al]

For the simple case of something bouncing off the floor (or any immoveable object) the coefficient of restitution is:

c = vf/v0
where v0 is the speed of the object before the collision, and vf is the speed after the collision.

For perfectly elastic collisions, c = 1.

[lavalamp]

It's like waiting for a bus, you have to wait for ages and then two come along at once.

[BMcN]

v1-v2/u1-u2, thats the one, thats guys!