ROTATIONAL MOTION

What would happen if g were not uniform across a body?

• The mass would vanish
• The object would float
• The weight would be zero
• The centre of gravity might not coincide with the centre of mass

How is the centre of gravity related to the point of support in a balanced object?

• They are always different
• They are unrelated
• They must coincide for stable balance
• They repel each other

What is the direction of gravitational torque on a particle below the centre of gravity?

• Upward
• Downward
• It has no direction
• It tends to rotate the body clockwise or counterclockwise depending on side

Can the centre of gravity lie outside the material of the body?

• No, it must be inside
• No, it vanishes
• Yes, in objects with hollow or irregular shapes
• Yes, but only in liquids

Why is the centre of gravity important in engineering design?

• It reduces cost
• It increases speed
• It affects appearance
• It affects stability and balance of structures