ROTATIONAL MOTION

What is the motion of the center of mass in Fig. 6.13(b)?

• Moving uniformly
• Accelerating
• At rest
• Rotating

What is the motion of the center of mass in Fig. 6.13(a)?

• At rest
• Accelerating
• Uniform motion
• Oscillating

In the lab frame, what kind of trajectories do binary stars appear to have?

• Straight lines
• Circular paths
• Complicated trajectories
• Spirals

What determines the path of the center of mass in an isolated system?

• Temperature of system
• External torque
• Initial momentum of the system
• Gravitational field

If the center of mass is at rest in a decay process, what is the total momentum of the decay products?

• Equal to initial momentum
• Greater than initial
• Zero
• Negative