Questions

A body initially at rest is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to :

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t1/2

t¾

t3/ 2

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detailed solution

Correct option is C

P=Fv=mdvdtv;mvdv=P dt ⇒ v2∝t ⇒ v∝t1/2 ⇒ x∝t3/2

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