ROTATIONAL MOTION

How does the height of the center of mass affect precession in the rim?

• It has no effect
• It stabilizes the rim
• It reduces rotation speed
• Higher CM increases lever arm, increasing torque and precession rate

What is the role of the right-hand rule in verifying the bicycle rim experiment?

• It measures speed
• It calculates mass
• It finds temperature
• It predicts the direction of angular momentum and torque for comparison with observation

How does the concept of torque explain the stability of a spinning top?

• Friction holds it upright
• It defies gravity
• Its shape prevents tipping
• The gravitational torque causes precession instead of toppling

What happens to the angular momentum of a system when it collapses inward, like a spinning star?

• It decreases
• It increases
• It becomes zero
• It remains constant, but angular speed increases

How can angular momentum be conserved in a system even when forces are acting?

• Forces always destroy angular momentum
• Conservation only applies without any forces
• Forces increase angular momentum
• Internal forces produce no net torque, so total angular momentum remains unchanged