The kinetic energy of a body of mass $2 k g$ moving with a speed of $10 m s^{- 1}$ is:

200 J

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100 J

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50 J

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none of these

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Solution

The correct option is B $100 J$
$m = 2 k g, v = 10 m s^{- 1}$
Kinetic energy $= \frac{1}{2} m v^{2} = \frac{1}{2} \times 2 \times 10^{2} = 100 J$

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The kinetic energy of a body of mass 2kg moving with a speed of 10ms−1 is:

The correct option is B 100Jm=2kg,v=10ms−1Kinetic energy=12mv2=12×2×102=100J

The kinetic energy of a body of mass $2 k g$ moving with a speed of $10 m s^{- 1}$ is:

The correct option is B $100 J$
$m = 2 k g, v = 10 m s^{- 1}$
Kinetic energy $= \frac{1}{2} m v^{2} = \frac{1}{2} \times 2 \times 10^{2} = 100 J$