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Kinetic Energy

A body of mas...

Question

A body of mass $4 k g$ is moving with a momentum of $12 k g m s^{- 1}$ . Its kinetic energy is

18 J

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24 J

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96 J

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12 J

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Solution

The correct option is B 18 J
Kinetic energy is, $K . E = \frac{P^{2}}{2 m}$

Here, $m = 4 K g$ and $P = 12 K g m s^{- 1}$

So, $K . E . = 18 J$

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