A ball of mass m and speed v travels horizontally, hits a wall, and rebounds with the same speed as it had before the collision. Determine the magnitude of the ball's change in momentum as a result of the collision.

2mv

Explanation:

Given

Ball travelling with speed v hits the wall and rebound with same speed

Initial momentum of ball is

Momentum after the collision is

Change in momentum is

Therefore magnitude of change in momentum is  

the average speed is 24.57 km/hr

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