ROTATIONAL MOTION

How is the velocity of the center of mass related to the total momentum of the system?

• v_cm = P_total * M_total
• v_cm = M_total / P_total
• v_cm = P_total / M_total
• v_cm = P_total^2 / M_total

What happens to the center of mass of a system if no external forces act on it?

• It accelerates
• It decelerates
• It moves with constant velocity
• It oscillates

When are the center of mass and center of gravity of an object the same point?

• Always
• Never
• When the gravitational field is uniform
• Only for symmetric objects

Is the angular momentum vector always parallel to the angular velocity vector for a rotating rigid body?

• Yes, always
• Only in space
• No
• Only for spherical objects

Can the center of mass of an object be located at a point where there is no physical material?

• No
• Only in liquids
• Only in gases
• Yes