Question

Two billiard balls each of mass 0.05kg moving in opposite directions with speed 6m/s collide and rebound with the same speed. What is the impulse imparted to each ball due to other. 

Answer 1

Initial momentum to the ball A = 0.05(6) = 0.3 kg m/s 

As the speed is reversed on collision,

final momentum of ball A = 0.05(-6) = -0.3 kg m/s 

Impulse imparted to ball A = change in momentum of ball A = final momentum – initial momentum = -0.3 -0.3 = -0.6 kg m/s.