ROTATIONAL MOTION

In the absence of external forces, what governs the center of mass motion?

• Temperature
• Pressure
• Initial velocity of the system
• Color of objects

What is the path of a star in the lab frame if the CM is moving?

• Perfect circle
• Straight line
• A combination of straight-line drift and circular orbit
• Spiral outward

How does the center of mass motion help in analyzing collisions?

• It increases heat
• It reduces mass
• It allows separation of overall motion from relative motion
• It changes charge

Why is the center of mass frame called the 'zero-momentum frame'?

• Because no motion
• Because energy is zero
• Because the total linear momentum is zero in this frame
• Because time stops

What is the role of Fig. 6.13 in illustrating decay kinematics?

• Shows energy loss
• Shows temperature change
• It shows how CM motion is preserved in different frames
• Shows magnetic effects