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Illustrated is a uniform cubical block of mass `M` and side `a` Mark the correct statement (s) A. The moment of inertia about axis `A`, passing through the centre of mass is `IA=1/6Ma^(2)`B. The moment of inertia about axis `B`, which bisects one of the cube faces is `IB=5/12Ma^(2)`C. The moment of in nertia about axis `C`, along one of the cube edges is `IC=2/3 Ma^(2)`.D. The moment of inertia about axis `D` which bisects one of the horizontal cube faces is `7/12 Ma^(2)` |
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Answer» Correct Answer - A::B::C Using the parallel axis theorem, check the distance carefully. `I_D=I_B` (symmetric) `I_A=I_B+m(a/2)^2=5/12Ma^2` `I_C=I_A+M(a/sqrt2)^2=2/3Ma^2` |
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