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A body of mass $2 kg$ is thrown up at a velocity of $10 m / s$ . Find the kinetic energy of the body at the time of throw. The value of $g = 10 m / s^{2}$ .

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200 J

100 J

0 J

50 J

answer is B.

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Detailed Solution

A body of mass

2 kg

is thrown up at a velocity of

10 m / s

. The kinetic energy of the body at the time of throw is

100 J

.
Given:

m = 2 kg

v = 10 m / s

Kinetic energy

= \frac{1}{2} m v^{2}

\Rightarrow

= \frac{1}{2} \times 2 \times (10)^{2}

\Rightarrow

= 100 J

Kinetic energy = 100 J

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