ROTATIONAL MOTION

What is the center of mass of a uniform hemisphere?

• At R/2 from the base
• At R from the base
• At the top
• At 3R/8 from the flat base along the axis

How does the center of mass of a system change during an explosion?

• It stops
• It accelerates randomly
• It disappears
• It continues with the same motion as before

What is the center of mass of a uniform wire bent into a circle?

• At a point on the wire
• At the top of the circle
• At the bottom
• At the center of the circle

What is the effect of gravity on the center of mass of a body?

• It has no effect
• It shifts the center of mass upward
• It eliminates the center of mass
• It acts as if all mass is concentrated there

What is the center of mass of a uniform square lamina?

• At a corner
• At the midpoint of a side
• At the center of mass of the top side
• At the intersection of the diagonals