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Calculate the moment of inertia of a : (...

Calculate the moment of inertia of a : (a)Disc about an axis passing through its edge and perpendicular to the circular base of the disc. (b) Solid sphere about an axis touching the sphere at its surface?

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(a)`I=I_(cm)+MR^2=1/2MR^2+MR^2=3/2MR^2` (b) `I=I_(cm)+MR^2=2/5MR^2+MR^2=7/5MR^2`.
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