A girl of mass 50 kg throws a ball of mass 0.1 kg against a wall. The ball strikes the wall horizontally with a speed of 20 m/s, and it bounces back…

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A girl of mass 50 kg throws a ball of mass 0.1 kg against a wall. The ball strikes the wall horizontally with a speed of 20 m/s, and it bounces back with this same speed. The ball is in contact with the wall 0.05s. What is the average force exerted on the wall by the ball?

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