ROTATIONAL MOTION

What is the plane of rotation for a particle in a rigid body rotating about the z-axis?

• The z-axis plane
• The xy-plane only
• A plane perpendicular to the z-axis passing through the particle
• The plane of force

What is the role of the center C in the rotational motion of a particle?

• It is the center of mass
• It moves with the particle
• It is the center of the circular path and lies on the axis of rotation
• It is arbitrary

What is the effect of doubling the angular velocity on angular momentum?

• It halves
• It quadruples
• It doubles the angular momentum
• No effect

How is the net work done related to rotational kinetic energy?

• W = FΔx
• Net work equals change in rotational kinetic energy
• W = τα
• W = Iα²

What is the condition for maximum work done by a force in rotational motion?

• When force is radial
• When force is at 45°
• When the force is tangential to the circular path
• When force is axial