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

Initial momentum of each ball before collision
= 0.05 `xx 6 kg ms^(-1)` = `0.3 kg ms^(-1)`
Final momentum of each ball after collision = 0.05 `xx 6 kg ms^(-1)` = `-0.3 kg ms^(-1)` Impulse imparted to each ball due to the other = final momentum - initial momentum = `0.3 kg ms^(-1)`- 0.3 kg ms^(-1)`
= - 0.6 `kg ms^(-1)` = 0.6 kg `ms^(-1)` ( in magnitude)
The two impulse are opposite in direction.