ROTATIONAL MOTION

How does the trajectory of a star in a binary system look in the CM frame?

• Straight line
• Parabolic escape
• Circular or elliptical about the CM
• Random walk

In a decay process, what ensures the center of mass continues its original path?

• Energy conservation
• Charge conservation
• Conservation of linear momentum
• Angular momentum

What is the physical meaning of the center of mass in a two-star system?

• The brighter star
• The midpoint
• The balance point where the system would balance if connected by a rod
• The point of maximum gravity

How does the center of mass frame simplify collision analysis?

• It increases energy
• It reduces mass
• It makes total momentum zero, enhancing symmetry
• It stops time

What is the motion of the center of mass in a symmetric explosion at rest?

• Moves in one direction
• Rotates
• Remains at rest
• Moves randomly