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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 |
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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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