A ball of mass 0.1 kg is moving with a velocity of 20 m/s. In which of the following cases would more force be required to stop the ball?
A. The ball stops in 1 second.
B. The ball stops in 2 seconds.

Case A

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Case B

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The force in A and B is the same.

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None of these

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Solution

The correct option is A Case A
The rate of change of momentum is high in case A as the time taken to stop the ball is less in case A than that in case B.
Using Newton’s second law, the force required to stop the ball in case A is higher than that in case B.

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A ball of mass 0.1 kg is moving with a velocity of 20 m/s. In which of the following cases would more force be required to stop the ball? A. The ball stops in 1 second. B. The ball stops in 2 seconds.

The correct option is A Case AThe rate of change of momentum is high in case A as the time taken to stop the ball is less in case A than that in case B. Using Newton’s second law, the force required to stop the ball in case A is higher than that in case B.

A ball of mass 0.1 kg is moving with a velocity of 20 m/s. In which of the following cases would more force be required to stop the ball?
A. The ball stops in 1 second.
B. The ball stops in 2 seconds.

The correct option is A Case A
The rate of change of momentum is high in case A as the time taken to stop the ball is less in case A than that in case B.
Using Newton’s second law, the force required to stop the ball in case A is higher than that in case B.