MHT CET Physics question

Radius of gyration is a distance measured:

(A)axis of rotation to the any point mass of the bodyCorrect
(B)between the two axis of rotation
(C)centre of mass of the system to the axis of rotation
(D)position vector of centre of mass from a fixed origin

Answer: (A)

Solution

The radius of gyration (with ) is the distance from the axis of rotation to the point at which the whole mass could be concentrated to give the same moment of inertia; it is

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Question ID VK-040162