A body of mass m accelerates uniformly from rest to v1 in time t1. As a function of time t, the instantaneous power delivered to the body is

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mv1tt1

mv12tt1

mv1t2t1

mv12tt12

answer is D.

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Detailed Solution

P=F→⋅v→=ma×at=ma2t [ as u=0]=mv1t12t=mv12tt12 As a=v1/t1

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