3) a 0.060-kg tennis ball, initially moving at a speed of 12 m/s, is struck by a racket causing it to rebound in the opposite direction at a speed of 18 m/s. what is the change in momentum of the ball?

Change in momentum will be 1.8 kgm/sec

Explanation:

We have given mass of the ball m = 0.060 kg

Initial speed = 12 m /sec

And final speed = 18 m/sec

We have to find the change in momentum

Change in momentum is given by

So ( negative sign is due to finally opposite direction of ball )

So change in momentum will be 1.8 kgm/sec

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