ROTATIONAL MOTION

What happens to the perpendicular component of angular momentum during fixed-axis rotation?

• It increases
• It decreases
• It remains constant
• It oscillates periodically

Which component of external torque is considered in rotation about a fixed axis?

• Torque perpendicular to the axis
• Torque in any direction
• Only the component along the axis of rotation
• Sum of all torque components

Why is angular momentum conserved in central force motion?

• Because energy is constant
• Because speed is constant
• Because the force is parallel to position vector, so torque is zero
• Because mass is uniform

What is the role of the inertia tensor in general rotational motion?

• It measures temperature
• It calculates linear speed
• It relates angular momentum and angular velocity vectors
• It determines color

How does the moment of inertia affect the rotational period of a physical pendulum?

• It has no effect
• Higher I decreases the period
• Higher I increases the period of oscillation
• It reverses direction