ROTATIONAL MOTION

What happens to the precession axis when the direction of spin is reversed?

• Precession stops
• The axis becomes vertical
• It doubles in speed
• The precession direction reverses

How does the moment of inertia influence angular momentum in rotating objects?

• It has no effect
• It decreases angular momentum
• It only affects linear motion
• Greater moment of inertia increases angular momentum for the same angular velocity

Why is the angular momentum of a system conserved during internal interactions?

• Internal forces increase angular momentum
• They destroy momentum
• They convert it to heat
• Internal forces produce equal and opposite torques that cancel out

What is the role of the center of mass in generating torque in the bicycle rim experiment?

• It absorbs torque
• It stops rotation
• It emits angular momentum
• Gravity acts at the center of mass, creating a lever arm about the pivot

How does the concept of angular momentum apply to celestial bodies?

• They have no angular momentum
• Their rotation is random
• They lose angular momentum quickly
• Planets conserve angular momentum in orbit due to negligible external torque