ROTATIONAL MOTION

What is the consequence of applying torque parallel to angular momentum?

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

How does angular momentum differ from linear momentum?

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

Why is the torque zero when both strings are held in the bicycle rim experiment?

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

What is the condition for maximum angular momentum of a particle about a point?

• 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

How does the length of the axle affect the precession of the bicycle rim?

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