1.

The kinetic energy of a body moving along a straight line varies with time as shown in figure. The force acting on the body: A. directly proportional to velocityB. inversely proportional to velocityC. zeroD. constant

Answer» Correct Answer - B
`(1)/(2) mv_(2) = ct`
`(m)/(2) 2v (dv)/(dt) =c`
`rArr m (dv)/(dt) = (c)/(v) F alpha (1)/(v)`


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