Hi! :'(, I'm implementing a 2d game. Where two or more ball falling down because of the gravity and they bouncy as well. If the ground floor become full of balls, then next balls will bouncy on other balls below it and then become still as natuarlly. It like you are watching a transparent box from one side and where many footballs are falling from above. I hope you have understood my problem. How I would implement it? I'm specially facing the problem, after collision of two balls. What would be there velocity after impact? I would be happy, if I got a complete guide. Please help.

The problem has been discussed a lot on this forum, and several good explanations and code samples are scattered out inhere. Just click the search button and type "ball collision" or similar.