Moment of inertia is also called rotational inertia.Why?

What is inertia?

Moment of inertia is the analogue of mass in rotational motion. But unlike mass, it is not a fixed quantity.Moment of inertia can be regarded as a measure of rotational inertia. Why?

Moment of inertia plays the same roll in rotational motion as mass in linear motion. The moment of inertia of a body changes when the axis of rotation changes.If the moment of inertia of a disc about an axis passing through its centre and perpendicular to its plane is (MR^2)/2) ( M is the mass of the disc and R its radius). Determine its moment of inertia about a diameter and about a tangent.

Moment of inertia is the analogue of mass in rotational motion. But unlike mass, it is not a fixed quantity. The moments of inertia of two rotating bodies A and B are I_A and I_B lf ( I_A> I_B) and their angular momentum are equal. Which one has a greater kinetic energy? Explain.

Moment of inertia in rotational motion is analogus to mass in linear motion.The moment of inertia of a circular disc about an axis perpendicular to the plane, at the centre is given by.