ROTATIONAL MOTION

What is the shape of the path traced by the axis of a spinning top during precession?

• A sphere
• A cylinder
• A circle
• A cone

In the case of a pedestal fan, what remains fixed even as the blades rotate?

• The tip of the blades
• The center of mass
• The pivot point O
• The entire fan base

For a rigid body rotating about a fixed axis, what is the value of r for a particle on the axis?

• r = 1
• r = infinity
• r = 0
• r = mass

What is true about the centers of the circular paths of particles P1 and P2 in rotational motion?

• They are at the center of mass
• They move with time
• They are outside the body
• Both centers lie on the axis of rotation

In rotational motion, what is the trajectory of a particle located at a distance r2 from the axis?

• A straight line
• A parabola
• A circle of radius r2
• An ellipse