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Q.

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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a

400 J

b

−400 J

c

−200 J

d

200 J

answer is B.

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Detailed Solution

W=12m(v2−u2)

=12×2(02−400)

=−400 J

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