Chapter 9, Problem 84A

To determine

To Explain: The bouncing of a tennis ball off a wall, its momentum is reversed using law of conservation of momentum.

Explanation of Solution

Introduction:

Momentum is mass times the velocity of the object.It is vector quantity.

The system comprises of earth, ball and wall are there. Total momentum before collision of the ball with the wall is same as total momentum after collision. Thus, the momentum is conserved.

Before collision the momentum of ball is P and after collision with the wall ball reverse the direction. Here, momentum of a wall is negligible. So, the momentum of a ball is conserved.