ROTATIONAL MOTION

What happens to the CG when a body is taken to the moon?

• It moves to the centre
• It disappears
• It remains the same relative to the body
• It becomes heavier

Is the CG the same as the centre of buoyancy?

• Yes, they are the same
• No, but they always coincide
• No, centre of buoyancy is for fluid upthrust, CG is for gravity
• Yes, both are central points

How is the CG different from the COM in theory?

• CG is always lower
• COM is heavier
• CG depends on gravity, COM depends only on mass distribution
• They are identical in all cases

What is the effect of increasing mass on the position of the CG?

• It remains unchanged
• It disappears
• It shifts toward the added mass
• It moves upward

Can a body have more than one CG?

• Yes, depending on color
• Yes, for liquids
• No, a rigid body has only one CG
• Yes, always two