Question

Give reason a karate player suddenly reduced the speed of his hand while hitting an ice slab.

Answer 1

The karate player strikes the slab of ice as fast as possible with his or her hand. In doing so, the entire momentum of the hand is reduced to zero in a very short time. As a result, the force delivered on the pile of tiles or a slab of ice is large enough to break it.

Answer 2

A karate player suddenly reduced the speed of his hand while hitting an ice slab is as follows :

Explanation:

• The second law of motion states that the change in momentum is equal to the applied external force.

• A karate player suddenly reduced the speed of his hand while hitting an ice slab. By doing so, he can reduce the entire momentum of the hand to zero in very short time.

• By doing so, time decreases and the force delivered on the piles is large enough to break it.

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Momentum

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