ROTATIONAL MOTION

What does the equation L = L_z imply about the body's rotation?

• The body is in free fall
• The body is symmetric about the rotation axis
• The angular velocity is zero
• There is no external torque

What is the role of symmetry in determining alignment of L and ω?

• It has no role
• It causes L to be perpendicular to ω
• Symmetry ensures that L is parallel to ω
• It reduces moment of inertia

Why is the vector OC × v perpendicular to the fixed axis?

• Because OC is zero
• Because v is zero
• Because it is parallel to gravity
• Because OC and v define a plane perpendicular to the axis

What is the physical meaning of r⊥ in rotational motion?

• Radial distance from origin
• Angular displacement
• Perpendicular distance from the axis of rotation
• Linear velocity component

How is the axial component of angular momentum related to moment of inertia?

• L_z = I / ω
• L_z = I ω
• L_z = I ω²
• L_z = m I ω