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A body of mass 6.25kg is travelling in a...

A body of mass 6.25kg is travelling in a horizontal straight line with a velocity of 3m`//` sec when a horizontal force P is applied to it at right angle to the initial direction of motion. If P varies according to the accompanying graph, remains constant in direction and is the only force acting on the body in its plane of motion,find the magnitude of the velocity of the body when t=2 sec.

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The correct Answer is:
`5m//s`
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