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What is the formula for Radius of gyration?

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Radius of gyration is the distance between the given axis and the centre of mass of the body. The centre of mass of a body is point where the entire mass of the body is supposed to be concentrated. It is denoted by ‘K ’.

If M is mass of the body, the moment of inertia is given as,
Moment of inertia (I) = mass of the body (M) × (radius of gyration)2

So, the formula for radius of gyration (K) is given as,

radius of gyration

where K = radius of gyration, I = Moment of inertia and M = mass of the body.

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