Calculate the kinetic energy of a body of mass 2 kg moving with a speed of $10 m s^{- 1} .$

150 J

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100 J

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200 J

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0 J

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Solution

The correct option is B
100 J

Given, $m = 2 k g$ , $v = 10 m / s$

Kinetic energy $= \frac{1}{2} m v^{2} = \frac{1}{2} \times 2 \times 10^{2}$ $= 100 k g m^{2} s^{- 2} = 100 J$

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