ROTATIONAL MOTION

How is angular speed in rad/s related to revolutions per minute (rpm)?

• ω = πN/30
• ω = N/60
• ω = 2πN/60
• ω = πN/60

What is the work done in rotational motion analogous to F dx in linear motion?

• F dθ
• τ dx
• τ dθ
• F ω dt

Which components of position vectors are relevant for torque in fixed-axis rotation?

• Components along the axis
• Total magnitude
• Components perpendicular to the axis
• Vertical components

Which forces need to be considered when calculating torque about a fixed axis?

• All external forces
• Forces parallel to the axis
• Forces in planes perpendicular to the axis
• Gravitational forces only

Why are perpendicular components of torque ignored in fixed-axis rotation?

• They are zero by design
• They do not exist
• Friction eliminates them
• Constraint forces cancel their effect