it is easy to lift heavy stone in water give reason.
It is easy to lift stone in water because of the upward force ( buoyant force) acting on it.
How much is the weight of an object on the moon as compared to its weight on the earth ? Give reason for your answer.
It is quite to lift heavy weights on the earth but it becomes very easy to lift the same heavy weights on the moon. Why?
It is easier to lift a heavy stone under water than in air. Explain.
It is easy to pull the bucket as long as it is inside water, but as soon as it starts coming out of the water, it appears to become heavy because of
Give reasons
(1) Dams are constructed on the river.
(2) It is easy to swim in a swimming pool than in a river.