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Three solid spheres each of mass P and r...

Three solid spheres each of mass P and radius Q are arranged as shown in fig. The moment of inertia of the arrangement about YY' axis.

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M.I of system about YY.`I=I_1+I_2+I_3`M.I of system about YY. 1 = 11+ 12 + 13 where `I_1`= moment of inertia of ring about diameter, `I_2=I_3` M.I. of inertia of ring about a tangent in a plane `becuase I=1/2mR^2+3/2mR^2+3/2mR^2+7/2mR^2`.
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