Manipur Board Solutions for Chapter: Floatation, Exercise 3: EXERCISES

What is thrust? State its direction of action.

In which direction does the buoyant force on an object immersed in a liquid act? State the magnitude of the buoyant force.

Why does a block of plastic or cork come up to the surface of the water when they are released underwater?

The volume of a solid block of mass $180 \mathrm{gm}$ is $100 {\mathrm{cm}}^3$. If the block is placed in the water of density $1 \mathrm{gm} {\mathrm{cm}}^{-3}$, will it float or sink? Explain.

A lump of plastic of relative density $0.4$ has a mass of $10 \mathrm{gm}$. It is placed in water. Calculate the volume of the lump projecting above the surface of the water.