1. The problem statement, all variables and given/known data I want to analyse two colliding balls, rolling flat on a billiard table. I have recorded two collisions from above the table. A 1D collision and a 2D collision. In both collisions only 1 of the balls are rolling before the collision. Known is: mass of the balls: m1=207g, m2=203g their radius: r=3cm friction between table and balls: F1=0.47N, F2=0.46N The velocity of the balls right before and after the collision. I'm supposed to be using some physics on rigid body dynamics. From the video you can see, that even though the collision is in 1D, the rolling ball keeps rolling after it has hit the other. My 1 question is, does the rolling ball transfer all of its translational energy, and keeps all the rotational itself? Or how does it work? In which other ways could i analyze these situations? Thank you.