InterviewSolution
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InterviewSolution
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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. zeroB. constantC. directly proportional to velocityD. inversely proportional to velocity |
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Answer» Correct Answer - B `(1)/(2) mv^(2) prop t` `(1)/(2) mv^(2) = At` where `A` is constant `v = sqrt((2A)/(m)) t^(1//2)` `v prop = sqrtt` `a = (dv)/(dt) = sqrt((2 A)/(m) (1)/(2 sqrtt))` `F = ma = sqrt(2 Am). (1)/(2sqrtt)` `F prop (1)/(v)` |
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