ROTATIONAL MOTION

What role does the right-hand rule play in determining angular momentum direction?

• It determines linear speed
• It measures torque
• It determines the direction of the vector resulting from r × p
• It calculates kinetic energy

Why do symmetric bodies have zero L_⊥?

• Because they don't rotate
• Because angular velocity is zero
• Because contributions from diametrically opposite particles cancel
• Because moment of inertia is zero

What determines the direction of angular momentum of a single particle?

• Only the direction of velocity
• The cross product of position and momentum vectors
• Mass of the particle
• Distance from axis

What is the vector nature of CP in rotational motion?

• Parallel to velocity
• Parallel to the axis
• It is perpendicular to the axis of rotation
• Along the axis

What is the direction of the unit vector k̂ in the context of fixed-axis rotation?

• Radially outward
• Tangential to motion
• Along the fixed axis of rotation
• Opposite to gravity