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  4. Assertion: The moment of inertia of a rigid body depends only on the mass of the body, its shape and size. Reason: Moment of inertia I = MR2, where M is the mass of the body and R is the radius vector.

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Q. Assertion : The moment of inertia of a rigid body depends only on the mass of the body, its shape and size.
Reason : Moment of inertia $ I = MR^2$, where $M$ is the mass of the body and $R$ is the radius vector.

System of Particles and Rotational Motion

Solution:

The moment of inertia of a rigid body depends on the mass of the body, its shape and size, distribution of mass about the axis of rotation, and the position and orientation of the axis of rotation.