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Q.

A goalkeeper in a football game pulls his hand backwards after holding the ball shot at the goal. This enables the goalkeeper to_

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a

Exert larger force on the ball

b

Increase the force exerted by the balls on the hands

c

Increase the rate of change of momentum

d

Decrease the rate of change of momentum

answer is D.

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Detailed Solution

A goalkeeper pulls his hand backward after holding the ball to decrease the rate of change of momentum.
According to the second law of motion, the force applied by an object is equal to the rate of change of momentum. Therefore, the goalkeeper allows some time for the ball to hit his/her hand as the momentum change rate is time-dependent. Thereby decreasing the rate of change of momentum and hence decreasing the force of hitting the ball.

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A goalkeeper in a football game pulls his hand backwards after holding the ball shot at the goal. This enables the goalkeeper to_