## moment of inertia

noun

*pl.*

**moments of inertia**

A measure of a body's resistance to angular acceleration, equal to:

a. The product of the mass of a particle and the square of its distance from an axis of rotation.

b. The sum of the products of each mass element of a body multiplied by the square of its distance from an axis.

c. The sum of the products of each element of an area multiplied by the square of its distance from a coplanar axis.

## moment of inertia

Noun

(*plural* moments of inertia)

- (physics) A measure of a body's resistance to a change in its angular rotation velocity
- (engineering) A measure of a body's resistance to bending; second moment of inertia; second moment of area.