Q:Bouncing Balls (Masses): two ball collide with each other

[pleasedontgocrazy]

If I know to balls and there velocities and the masses how do i find there final velocities. So far I have assumed that the two balls have the same mass but this may not be true in some cases.

Here is the code for a collision so far
 
  'Ball A
 
  NewAngle = WorkOutRADAngle(Ball(BallA), Ball(BallB))
 
  NewSpeed(BallA).X = BallSpeed(BallB) * -Cos(NewAngle - BallAngle(BallB))
  NewSpeed(BallA).Y = BallSpeed(BallA) * Sin(NewAngle - BallAngle(BallA))
 
  MoveBall(BallA).X = (NewSpeed(BallA).Y * Sin(NewAngle)) - (NewSpeed(BallA).X * Cos(NewAngle))
  MoveBall(BallA).Y = (NewSpeed(BallA).Y * -Cos(NewAngle)) - (NewSpeed(BallA).X * Sin(NewAngle))
 
  'Ball B
 
  NewAngle = WorkOutRADAngle(Ball(BallB), Ball(BallA))
 
  NewSpeed(BallB).X = BallSpeed(BallA) * -Cos(NewAngle - BallAngle(BallA))
  NewSpeed(BallB).Y = BallSpeed(BallB) * Sin(NewAngle - BallAngle(BallB))
 
  MoveBall(BallB).X = (NewSpeed(BallB).Y * Sin(NewAngle)) - (NewSpeed(BallB).X * Cos(NewAngle))
  MoveBall(BallB).Y = (NewSpeed(BallB).Y * -Cos(NewAngle)) - (NewSpeed(BallB).X * Sin(NewAngle))

What happens when the balls have differnt masses?

Here the program so far: http://www.freewebs.com/dave_fooks/BounceBalls.exe

P.s. Moveball is the new velocity for the ball

[Fu-Kwun Hwang]

Please check out 2D collision