ROTATIONAL MOTION

What is the role of constraint forces in fixed-axis rotation?

• To increase angular speed
• To reduce friction
• To cancel perpendicular components of torque
• To measure torque

What happens to the axis of rotation when a perpendicular torque is applied?

• It rotates freely
• It disappears
• Constraint forces prevent its movement
• It aligns with torque

In the work formula for rotation, what does dθ represent?

• Diameter
• Time interval
• Torque element
• Infinitesimal angular displacement

What quantity in rotational motion corresponds to linear displacement?

• Angular velocity
• Angular acceleration
• Torque
• Angular displacement

What is the angular displacement of a body with initial speed 40π rad/s and acceleration 4π rad/s² over 16 s?

• 640π rad
• 1152π rad
• 512π rad
• 1664π rad