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A body of mass 5 kg at rest is under the action of a force which gives it a velocity given by v = 3 × t m/s, here ‘t’ is time in seconds. The work done by the force in two seconds will be

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90 J

45 J

180 J

30 J

answer is A.

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Detailed Solution

acceleration= 3 m/ $s^{2}$

Displacement in 2 sec= 6m.

Mass= 5 kg

Work done = 90 J

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