Question

Assertion (A) : Moment of inertia of a rotating rigid body remains constant irrespective of its angular velocity.
Reason (R) : Neither mass of rigid body nor distances of particles of rigid body from axis of rotation change during the rotation.

• A. Both A and R are true and R is correct explanation of A
• B. Both A and R are true and R is not correct explanation of A
• C. A is true and R is false
• D. A is false and R is true

Answer 1

Answer: (A)

Both A and R are true and R is correct explanation of A

$I={MR}^2$
$\text{Moment of inertia}$ of rigid body depends upon the distance of the mass from the axis of the rotation. It is independent from the angular velocity of the rotation.