Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed `6 ms^(-1)` collide and rebound with the same speed What is the impulse imparted to each ball due to the other ?

Explanation

Let the two balls A and B moving in opposite directions collide and rebound with same speed. Initial momentum of the ball A
`=0.05 times (6)=0.3 kg ms^-1`
Final momentum of the ball A ,
`=0.05(-6)=-0.3 kg ms^-1`
Impulse imparted to ball A= change in momentum of ball
A=final momentum -initial momentum
`=-0.3-0.3=-0.6 kg ms^-1`
Initial momentum of the ball B
`=0.05 times (-6) =-0.3 kg ms^-1`
Final momentum of the ball B
`=0.05 times (6)=0.3 kg ms^-1`
Impulse imparted due to B
`=0.3-(-0.3)=0.6 kg ms^-1`
Impulse on each ball is `0.6 kg ms^-1` in magnitude but these two impulses are opposite in direction.