Ball physics?

Hello
I'm having trouble with some physics.
In my example I have 2-3 balls with different size, but the same mass. They are constantly accelerating diagonally towards each other. The position is offset slightly so they don't hit each other in the same direction as they accelerate.
How should I calculate how they react when they collide?

Check out the last section of this page on pool physics http://archive.ncsa.illinois.edu/Cla...send/math.html

It even tells you how to calculate the spin, if you're into that sort of thing.


Cheers,
Neal