InterviewSolution
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InterviewSolution
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There object, `A` : (a solid sphere), `B` : (a thin circular disk) and `C` : (a circular ring), each have the same mass `M` and radius `R`. They all spin with the same angular speed `omega` about their own symmetry axes. The amount of work `(W)` required ot bring them to rest, would satisfy the relationA. `W_(B) gt W_(A) gt W_(C)`B. `W_(A) gt W_(B) gt W_(C)`C. `W_(C) gt W_(B) gt W_(A)`D. `W_(A) gt W_(C) gt W_(B)` |
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Answer» Correct Answer - C Work done required to bring them rest `Delta W=Delta KE` `DeltaW=(1)/(2)Iomega^(2)` `DeltaW prop I` for same `omega` `W_(A) : W_(B) : W_(C) =(2)/(5)MR^(2) : (1)/(2)MR^(2) : MR^(2)` `=(2)/(5): (1)/(2):1` `=4:5:10` `implies W_(C) gt W_(B) gt W_(A)` |
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