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A 500-kg car, moving with a velocity of $36 {kmh}^{- 1}$ on a straight road unidirectionally, doubles its velocity in 1 min. The average power delivered by the engine for doubling the velocity is

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750 W

1050 W

1150W

1250 W

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detailed solution

Correct option is D

u = 10 ms-1, v = 20 ms-1Work done = Increase in kinetic energy=12×500[202−102]=500×30×102Power = 500×30×102×60=1250 W

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A 500-kg car, moving with a velocity of 36 kmh-1 on a straight road unidirectionally, doubles its velocity in 1 min. The average power delivered by the engine for doubling the velocity is

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A 500-kg car, moving with a velocity of $36 {kmh}^{- 1}$ on a straight road unidirectionally, doubles its velocity in 1 min. The average power delivered by the engine for doubling the velocity is