ROTATIONAL MOTION

What is the SI unit of angular acceleration?

• meter per second squared
• revolution per second
• degree per second
• radian per second squared

What happens to the direction of angular velocity in general rotational motion?

• It always remains fixed
• It changes only if force is applied
• It may change with time
• It reverses every half rotation

What determines the effectiveness of a force in producing rotation?

• Only magnitude of force
• Magnitude and point of application only
• Magnitude, point of application, and direction of force
• Only direction of force

How is torque defined for a single particle?

• τ = F × r
• τ = r + F
• τ = r · F
• τ = r × F

What is another term for moment of force?

• Energy
• Work
• Torque
• Power