I am doing a pool simulator (billiard) and have found a problem im not sure of how it works in real life. When 2 balls collide they impart rotation onto each other ( this i have tested my self and found true ) but im confused as to how much? i can work out the tangential velocities of the balls at the point they collide and this i guess combined with some coefficient of friction would do the trick, but is this how it works? is friction dependant on velocity?
sorry if confusingly explained and for the english.