Question

Define moment of inertia of a body.give its units and dimensions.explain the physical significance of moment of inertia.

Answer 1

every material body has a property by virtue of which it resists the change in state of rest or of motion this is known as inertia

Answer 2

Inertia is the tendency of all matter to remain at rest or in motion until acted on by a force. Moment of inertia is a measure of an object's rotary inertia, or its tendency to resist increasing or decreasing rotation about some axis. Inertia is related only to mass, but moment of inertia is related also to distribution of mass. Mass far away from the axis of rotation increases moment of inertia more than the same mass near the axis of rotation.