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Moment of inertia of a body about an axis is a measure of its:
ALinear inertia
BRotational inertia about that axis
CTranslational kinetic energy
DAngular momentum
Answer & Solution
Correct answer: B. Rotational inertia about that axis
1. I = Σ m_i r_i² for a system of particles about a given axis.
2. It plays the role of mass in rotational dynamics: τ = I α (analog of F = m a).
3. Hence it quantifies the body's resistance to angular acceleration about that axis.
_Source: NCERT Class 11 Physics Ch 6 §6.8 Moment of Inertia_
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