ROTATIONAL MOTION

For a rigid body rotating about the z-axis, what is true about all centers of circular paths?

• They are outside the body
• They move with time
• They lie on the z-axis
• They are at infinity

What is the motion of the center C1 in Fig. 6.4?

• It moves in a small circle
• It oscillates along x-axis
• It remains fixed on the z-axis
• It drifts with time

In Fig. 6.4, what is the significance of point C2?

• It is the center of mass
• It is a random point
• It is the center of the circular path of particle P2
• It is the tip of the top

What happens to the motion of a particle as it gets closer to the axis of rotation?

• Its speed increases
• Its path becomes elliptical
• The radius of its circular path decreases
• It stops moving immediately

How does the radius of the circular path of a particle relate to its distance from the axis?

• It is half the distance
• It is double the distance
• It is equal to the perpendicular distance from the axis
• It has no relation