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A thin hollow sphere of mass `m` is completely filled with non viscous liquid of mass `m`. When the sphere roll-on horizontal ground such that centre moves with velocity `v`, kinetic energy of the system is equal toA. `1/2 mv^(2)`B. `mv^(2)`C. `4/3 mv^(2)`D. `4/5 mv^(2)` |
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Answer» Correct Answer - 3 `(3) KE =1/2 mv^(2)+1/2 2/3 mR^(2) (V/R)^(2)+1/2 mv^(2)` `=(mv^(2))/2(1+2/3+1)` `=(4mv^(2))/3` |
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