ROTATIONAL MOTION

How does friction affect the precession of the bicycle rim over time?

• It eliminates precession immediately
• It makes precession constant
• It reverses spin direction
• It gradually reduces angular speed, increasing precession rate and eventually stopping motion

What is the geometric shape traced by the tip of the angular momentum vector during precession?

• A straight line
• A spiral
• A parabola
• A circle

How does the mass of the bicycle rim affect precession?

• It stops precession
• It makes precession faster regardless
• It has no effect at all
• Greater mass increases torque and moment of inertia, with competing effects

What is the main factor that sustains precessional motion in the rim?

• Electromagnetic forces
• Buoyancy
• Inertia alone
• Continuous torque due to gravity acting off the pivot point

How can you verify the direction of torque in the bicycle rim experiment?

• By measuring temperature
• By counting rotations
• By weighing the rim
• Use the right-hand rule on r × F, where r is from pivot to center of mass and F is gravity