Question

What is meant by moment of inertia?

Answer 1

Moment of inertia is a measure of inertia of the body when the body is rotating about an axis.

It is found by summation of mass * square of radius of gyration for all particles in the object.

Moment of inertia plays a part ,similar to mass in linear kinetics, in rotaional dynamics.

Answer 2

The moment of inertia is a physical quantity which describes how easily a body can be rotated about a given axis. Inertia is the property of matter which resists change in its state of motion. Inertia is a measure of the force that keeps a stationary object stationary, or a moving object moving at its current speed.