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A force is applied on a body of mass 20 kg moving with a velocity of 40 ms^- 1.

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A force is applied on a body of mass 20 kg moving with a velocity of 40 ms- 1. The body attains a velocity of 50 ms-1 in 2 seconds. Calculate the work done by the body.

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= 1/2 x 20 (502 -402)

= 9000 J

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