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A thin hollow cylinder open at both ends (i) Slides without rotating (ii) Rolls without slipping, with the same speed. The ratio of kinetic energies in the two cases is |
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Answer» `1:1` K.E. of rolling body= K.E. of translation+ K.E. of rotation `E=1/2mv^(2)+1/2Iomega^(2)=1/2mv^(2)+1/2mR^(2).OMEGA^(2)` `E=1/2mv^(2)+1/2mv^(2)=mv^(2)` `therefore("Translation K.E.")/(.TOTAL K.E.")=1/2.(mv^(2))/(mv^(2))=1/2` |
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