ROTATIONAL MOTION Quiz

• It reduces the magnitude of angular momentum
• It reverses the direction of rotation
• It brings the system to rest
• It causes the angular momentum vector to precess

• Radially outward
• Tangential to the rim
• Vertically downward
• Along the axle, determined by the right-hand rule

• Centrifugal force
• Air resistance
• Tension in the string only
• Gravitational force acting on the center of mass of the rim

• The rim stops rotating immediately
• The rim falls straight down
• The rim reverses its direction of rotation
• The plane of rotation precesses around the remaining string

• Torque is independent of angular momentum
• Torque is proportional to angular displacement
• Torque equals angular momentum divided by time
• Torque equals the time rate of change of angular momentum