ROTATIONAL MOTION

Which law governs the motion of the center of mass of a system of particles?

• Newton’s first law only
• Newton’s third law
• Law of gravitation
• Newton’s second law applied to the center of mass

What is the net effect of internal forces on the total momentum of a system?

• They increase the total momentum
• They decrease the total momentum
• They reverse the momentum direction
• They cancel out and produce no net change

How is the linear momentum of a single particle defined?

• p = m/a
• p = F·t
• p = m^2v
• p = mv

Which of the following is conserved when no external forces act on a system of particles?

• Kinetic energy only
• Potential energy only
• Total mechanical energy
• Linear momentum

What role do internal forces play in the motion of the center of mass of a system?

• They accelerate the center of mass
• They slow down the center of mass
• They change the direction of the center of mass
• They have no effect on the center of mass motion