InterviewSolution
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InterviewSolution
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A body of mass `m` is acceleratad uniformaly from rest to a speed `v` in a time `T` . The instanseous power delivered to the body as a function of time is given byA. `(1)/(2) m (v)/(t_(1)) t^(2)`B. ` m (v)/(t_(1)) t^(2)`C. `(1)/(2) ((mv)/(t_(1))) ^(2) t^(2)`D. `(1)/(2) mv^(2) ((t)/(t_(1))) ^(2)` |
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Answer» Correct Answer - D `a = v//t_(1)`. Displacement after time `t` : `S = (1)/(2) at^(2) = (1)/(2) (v)/(t_(1)) t^(2)` `W = FS = maS = m (v)/(t_(1)) (1)/(2) (v)/(t_(1)) t^(2) = (1)/(2) m v^(2) ((t)/(t_(1)))^(2)` |
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