ROTATIONAL MOTION

What is the significance of internal forces in the decay of a radium nucleus?

• They increase the total momentum
• They change the center of mass velocity
• They do not change the total momentum of the system
• They stop the motion

What type of motion do the stars in a binary system exhibit in the lab frame?

• Only orbital motion
• Only linear motion
• Oscillatory motion
• Combination of uniform motion and orbital motion

In the center of mass frame of a binary star system, how do the stars move?

• In straight lines
• In circular orbits about the center of mass
• With random motion
• Stationary

What is the advantage of using the center of mass frame in physics problems?

• Increases complexity
• Simplifies the analysis of motion
• Makes energy non-conservative
• Eliminates gravity

In a binary star system with no external forces, how does the center of mass move?

• In a circular path
• With increasing speed
• Uniformly in a straight line
• In a parabolic path