Q56 of 176 Page 125

State the principle of flotation.

According to the principle of floatation: An object will float in a liquid if the weight of object is equal to the weight of liquid displaced by it.

Weight of object = Weight of liquid displaced by it.

What is the cause of buoyant force?

When a boat is partially immersed in water, it displaces 600 kg of water. How much is the buoyant force acting on the boat in Newton? (g = 10 m s^-2)

A floating boat displaces water weighing 6000 Newton.

(i) What is the buoyant force on the boat?

(ii) What is the weight of the boat?

Define density. What is the SI unit of density?