ROTATIONAL MOTION

How does the angular momentum of a system change if an external torque is applied briefly?

• It remains unchanged
• It oscillates
• It changes by the impulse of the torque
• It vanishes

What happens to L_z if the moment of inertia decreases while angular momentum is conserved?

• L_z increases
• L_z decreases
• L_z becomes zero
• Angular velocity increases to keep L_z constant

Why is the term m r⊥² ω significant in rotational motion?

• It is linear momentum
• It is kinetic energy
• It is torque
• It represents the axial angular momentum of a single particle

What is the contribution of a particle at the axis of rotation to L_z?

• Maximum
• Half of maximum
• Zero, because r⊥ = 0
• Infinite

How does the velocity vector relate to the plane formed by OC and CP?

• It lies in the same plane
• It is parallel to OC
• It is opposite to CP
• It is perpendicular to the plane containing OC and CP