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The ratio of the radii of gyration of a hollow sphere and a solid sphere of the same radii about a tangential axis is
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a
73
b
521
c
215
d
259
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Correct option is B
For hollow sphere, KH=Im=23mR2+mR2m=53RFor solid sphere, KS=Im=25mR2+mR2m=75R∴ KHKS=2521=521Similar Questions
Two discs have mass ratio 1 : 2 and diameter ratio 2 : 1, then find the ratio of their moments of inertia.
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