A particle of mass 2 kg starts moving in a straight line with an initial velocity of 2 m/s at a constant acceleration of 2 m/s2 . Then rate of change of kinetic energy

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is four times the velocity at any moment

is two times the displacement at any moment

is four times the rate of change of velocity at any moment

is constant throughout

answer is A.

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Detailed Solution

K=12mv2 ∴dKdt=mvdvdt=mdvdtv=mav

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