Question

define radius of gyration ? derive an expression for M I of uniform disc.​

Answer 1

Answer:

Radius of gyration or gyradius of a body about an axis of rotation is defined as the radial distance to a point which would have a moment of inertia the same as the body's actual distribution of mass, if the total mass of the body were concentrated.

Answer 2

Answer:

The radius of gyration of a body rotating about an axis is defined as the distance between axis of rotation and the point at which entire mass of the body can be supposed to be concentrated so as to give the same moment of inertia as that of body about given axis.

Explanation:

I hope it helps u dear friend ^_^♡♡