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Velocity – time graph of a particle of mass 2 kg moving in a straight line is as shown in figure. Work done by all the forces on the particle is

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400 J

- 400 J

- 200 J

200 J

answer is B.

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Detailed Solution

W = \frac{1}{2} m (v^{2} - u^{2})

$= \frac{1}{2} \times 2 (0^{2} - 400)$

$= - 400 J$

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