Question

The moment of inertia of a uniform circular disc of radius R and mass M about an axis passing from the edge of the disc and normal to the disc is

(a)  MR²

(b) 1/2  MR²

(c)  3/2 MR²

(d)  7/2 MR²

Answer 1

Correct option (c)  3/2 MR²

Explanation:

 M.I. of disc about its normal = 1/2 MR²

M.I. about its one edge  = MR² + MR²/2

(Perpendicular to the plane)

Moment of inertia  = 3/2 MR²