ROTATIONAL MOTION

How can we observe the center of mass motion in a binary star system?

• By measuring brightness
• By listening to radio waves
• By tracking the midpoint of the line joining the stars weighted by mass
• By counting pulses

What determines the direction of motion of decay products in the lab frame?

• Temperature
• Color of particles
• Conservation of momentum and initial motion
• Magnetic field

In a two-body decay with unequal masses, how do their speeds compare in the CM frame?

• Both move at same speed
• Heavier moves faster
• The lighter particle moves faster
• Speeds are unrelated

Why is the center of mass frame preferred in particle physics experiments?

• It increases speed
• It reduces particle mass
• It simplifies the analysis of collision and decay products
• It stops time

What is the significance of Fig. 6.14(b) in understanding binary star motion?

• Shows stars colliding
• Shows stars escaping
• It shows pure orbital motion around a stationary center of mass
• Shows random motion