what is radius of gyration of a solid sphere of mass M and radius R about one of its diameter
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The square radius of gyration is the average squared distance of any point in the object (polymer coil) from it's center of mass. ... It is instructive to remember that the radius of gyration of a solid sphere is not equivalent to its physical radius. For a sphere, Rg2 = 3R2∕5
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Radius of gyration or gyradius of a body about an axis of rotation is defined as the radial distance of a point ,from the axis of rotation at which, if whole mass of the body is assumed to be concentrated, its moment of inertia about the given axis would be the same as with its actual distribution of mass.
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