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Kinetic Energy

A body having...

Question

A body having 5 kg mass is traveling with a certain velocity and has $10 k g m s^{- 1}$ momentum. What will be its kinetic energy?

A

50 J

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B

100 J

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C

10 J

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D

2 J

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Solution

The correct option is C
10 J

Given, mass of the body $= 5 k g$ and momentum $= 10 k g m s^{- 1}$ .
Kinetic Energy = $\frac{({Momentum)}^{2}}{2 \times Mass}$ = $\frac{10^{2}}{2 \times 5}$ = 10 J.

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