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प्रश्न
A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to
विकल्प
exert larger force on the ball
reduce the force exerted by the ball on hands
increase the rate of change of momentum
decrease the rate of change of momentum
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उत्तर
decrease the rate of change of momentum
Explanation:
The goalkeeper pulls his hands backwards after holding the ball to decrease the rate of change of momentum by increasing the time. By doing this, less force is exerted on his hands (v Force is directly proportional to the rate of change of momentum).
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