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Question

If a body has mass 2 kg and momentum 4 kg.m/s, then find its kinetic energy.

A
2 J
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B
8 J
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C
4 J
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D
6 J
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Solution

The correct option is C 4 J
If m be the mass of the body and p be the momentum of the body, the kinetic energy of the body is
KE=p22m=422(2)=4J

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