ROTATIONAL MOTION

Why is the swivel chair experiment effective for demonstrating conservation?

• Because it uses weights
• Because gravity is removed
• Because friction is minimized and no external torque acts
• Because it spins fast

What happens to angular momentum if a rotating person stands up on the chair?

• It increases
• It decreases
• It remains constant if no external torque
• It becomes zero

What is the mathematical expression for conservation of angular momentum in fixed-axis rotation?

• I = constant
• ω = constant
• Iω = constant
• I²ω = constant

What is the key principle illustrated in Fig. 6.32(b)?

• Energy conservation
• Linear momentum conservation
• Force balance
• Conservation of angular momentum

What is the effect of external torque on angular momentum in fixed-axis rotation?

• It changes L⊥
• It stops rotation
• It changes Lz
• It has no effect