ROTATIONAL MOTION

How is the total angular momentum of a symmetric body expressed?

• L = m v r
• L = I ω k̂
• L = r × F
• L = τ t

Why is L_z important in rotational dynamics?

• It measures linear motion
• It determines gravitational force
• It is irrelevant
• It determines the response to external torque about the axis

What happens to the angular momentum vector in an asymmetric rotating body?

• It is always zero
• It reverses direction
• It does not lie along the rotation axis
• It aligns with velocity

What is the net L_⊥ for a rectangular lamina rotating about an axis through its center but not symmetric?

• Zero
• Constant
• Non-zero
• Equal to Iω

What is the net L_⊥ for a uniform ring rotating about its central axis?

• Non-zero
• Infinite
• Zero
• Equal to L_z