ROTATIONAL MOTION Quiz

• It causes precession
• It makes L zero instantly
• It changes direction only
• It changes the magnitude of angular momentum

• They are identical
• Angular momentum is scalar
• Linear momentum includes radius
• It depends on the reference point and involves rotational motion

• Friction cancels torque
• Air pressure balances it
• Rotation nullifies torque
• The center of mass lies on the line joining the supports, eliminating lever arm

• When it moves directly toward the point
• When it is at rest
• When distance is minimum
• When the velocity is perpendicular to the position vector

• It has no effect
• It stabilizes without precession
• It reduces rotational speed
• Longer axle increases lever arm, increasing torque and precession rate