68th BPSC Prelims (2023), question 110

🔬 Science & Technology

  1. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to

    1. exert large force on the ball
    2. increase the force exerted by the ball on hands
    3. decrease the rate of change of momentum
    4. More than one of the above
    5. None of the above
    Show answer

    Answer: C — decrease the rate of change of momentum

    Pulling hands back increases the time of impact, decreasing the rate of change of momentum and hence the force felt.

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