The moment of inertia of a rigid body about an axis:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Is a scalar quantity, dependent on the axis.
The moment of inertia (I) is a scalar quantity that represents a body's resistance to rotational acceleration. Unlike mass, which is constant, the moment of inertia depends on the chosen axis of rotation because it is calculated as I = ∑ mi ri2. As the distance (r) of the mass particles from the axis changes when the axis is shifted, the total moment of inertia also changes. While it is technically a second-rank tensor in advanced physics, in general mechanics, it is treated as a scalar for a fixed axis.