Work Energy Power

JEE Main level, single correct, medium

165 of 183

Question 165 of 183

A body of mass mm is accelerated uniformly from rest to a speed vv in a time TT. The instantaneous power delivered to the body as a function time is given by

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Answer: (A) mv2 T2⋅t\frac{\mathrm{mv}^2}{\mathrm{~T}^2} \cdot \mathrm{t}

P=(ma)⋅v\mathrm{P}=(\mathrm{ma}) \cdot \mathrm{v}
=ma2t=m a^2 t
=mV2T2t=m \frac{V^2}{T^2} t

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