Question

prove that the sum of angle of scattering and angle of recoil make 90 degrees in an elastic collision in 2 dimensions

Answer 1

Answer:

For a non-head-on elastic collision between equal masses, the angle between the velocities after the collision will always be 90 degrees. The spot on a pool table is placed so that a collision with a ball on the spot which sends it to a corner pocket will send the cue ball to the other corner pocket.