Question

From a circular disc of radius R and mass 9m, a small disc of radius 3 is removed from the disc,the moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through the center O?

Answer 1

Answer:

4mr^2

As mass removed will be m

Find moment of inertia of 9m at axis - moment of inertia of m mass at the axis