question_answer 17)

Two billiard balls each of mass 0.05 kg moving in opposite directions with speed of  collide and rebound with the same speed. What is the impulse imparted to each ball by the other ?  

Answer:

Fig. 5.129 (a) and 5.129 (b) show the situations of the two balls before and after the collision. Fig. 5.129   Impulse imparted to one ball by the other = Change in momentum. For ball A:    Momentum before collision    Momentum after collision    Impulse imparted to ball A due to ball B . For ball B:   Momentum before collision    Momentum after collision    Impulse imparted to ball B due to ball A .