ROTATIONAL MOTION

How does the concept of center of mass simplify the analysis of complex systems?

• It eliminates all forces
• It makes internal forces visible
• It doubles the mass
• It allows treating the system as a single point with total mass

What is the implication of P = MV for a system with zero total momentum?

• All particles are at rest
• The system is destroyed
• The center of mass accelerates
• The center of mass is at rest or moving with constant velocity

Is the total momentum of a system affected by the reference frame?

• No, it is always zero
• It is the same in all frames
• Only direction changes
• Yes, its value depends on the frame

What determines the path of the center of mass in projectile motion?

• Internal structure
• Mass of fragments
• Shape of the object
• Initial velocity and gravity

How do internal forces affect individual particles in a system?

• They have no effect on any particle
• They only affect mass
• They stop all motion
• They can change their velocities and positions