ROTATIONAL MOTION

Two particles of masses m and m are at (0,0) and (a,a). Where is the center of mass?

• (a,a)
• (0,0)
• (a/2, a/2)
• (a,0)

What is the center of mass of a uniform hollow hemisphere from its base?

• R/4 from the base
• R/3 from the base
• R/2 from the base
• 3R/8 from the base

In a binary star system, where is the center of mass located?

• At the midpoint
• Closer to the less massive star
• At the edge of the galaxy
• Closer to the more massive star

A rectangular lamina has a small mass attached to one corner. Where does the center of mass shift?

• Away from that corner
• It does not shift
• Toward the corner with added mass
• To the center

Which of the following does NOT affect the position of the center of mass?

• Mass distribution
• Shape of the object
• Acceleration of the system
• Positions of particles