Rotational Motion

**Moment of inertia**

- Moment of inertia of a body about a given axis is the sum of the products of masses of all the particles of the body and squares of their respective perpendicular distance from the axis of rotation.

- K.E. of rotation of body
- Mass (
*m*) of the body is an analogue of moment of inertia (*I*) of the body in rotational motion.

**Radius of gyration**

- Radius of gyration of a body about a given axis is the perpendicular distance o…

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