alleryMoment 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: syllabus Physics Ch 6 §6.8 Moment of Inertia_
Keep practising System of Particles and Rotational Motion
Browse all System of Particles and Rotational Motion questions for AP Intermediate 1st Year, or explore more Physics topics.
Related questions
Moment of inertia depends on the mass, the axis, and the body's:The parameter measuring how a rotating body's mass is distributed about the axis is the raThe equation relating load arm and effort arm expresses the principle of:For translational equilibrium, the sum of force components along two perpendicular axes muIf the total external torque on a system is zero, what is conserved?The time rate of change of angular momentum of a particle equals the:A flywheel's large moment of inertia lets it resist sudden changes in:Total angular momentum of a system is found by adding the individual angular momenta: