ROTATIONAL MOTION

What is the function of the suspension point in the bicycle rim experiment?

• It reduces air resistance
• It powers the rotation
• It measures time
• It serves as the pivot about which torque and angular momentum are calculated

How does the conservation of angular momentum apply to figure skaters?

• They increase mass
• They apply torque with feet
• They stop external forces
• They reduce moment of inertia to increase spin rate

What is the impact of a sudden external impulse on angular momentum?

• It has no effect
• It destroys angular momentum
• It only affects mass
• It causes an abrupt change in angular momentum equal to the torque impulse

How does the angle between r and p affect angular momentum magnitude?

• It has no effect
• It only affects direction
• It inverts the vector
• It determines the sine factor in l = r p sinθ

What is the difference between static and dynamic stability in rotating systems?

• They are the same
• Static stability involves rotation
• Dynamic stability is weaker
• Dynamic stability arises from angular momentum, resisting changes in orientation