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Moment of Inertia of a Rod

A wheel of ...

Question

A wheel of mass 10 kg has a moment of inertia of 160kg.m2 about it's own axis .The radius of gyration wil be

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Solution

We know that
I = mk²
Where k is the radius of gyration.
160 = 10 k²
k² = 16
k = 4 m

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