ROTATIONAL MOTION

What is the moment of inertia of a ring about a tangent in its plane?

• M R²
• M R²/2
• 3 M R²/2
• 2 M R²/5

How is the moment of inertia of a composite body calculated?

• By averaging
• By multiplying
• By adding moments of inertia of parts about same axis
• By vector addition

What is the role of the axis in determining moment of inertia?

• It has no role
• It only matters if external torque is present
• It defines the reference for mass distribution
• It changes the mass

Can two different bodies have the same moment of inertia?

• No, never
• Only if same material
• Yes, if mass and distribution are adjusted
• Only in vacuum

How does doubling angular velocity affect rotational kinetic energy?

• It doubles
• It quadruples
• It halves
• No change