CHAPTER EXERCISE

When a boy gets into a floating boat, what happens to the buoyant force on the boat?

How is it possible to lift a heavy object in water with ease?

Why does a body lose weight when immersed in a liquid?

Why a wide steel belt is provided on the wheels of an army tank?

A steel block weighs $56.7 \mathrm{gf}$ in water. When the block is tied with a cork of weight  $6 \mathrm{gf}$, the combination is found weighing $40.5 \mathrm{gf}$ in water. Find relative density of the cork.

A wooden block is floating in a liquid (water). The dimension of the wooden block inside water is $50 \mathrm{cm}\times 50 \mathrm{cm}\times 50 \mathrm{cm}$. Find the magnitude of the buoyant force acting on the block. (Take, $\mathrm{g}=9.8 \mathrm{m}/{\mathrm{s}}^2$)

An object weighs $20 \mathrm{gf}$ in air,$18.2 \mathrm{gf}$ in a liquid (other than water) and$18.0 \mathrm{gf}$ in water. What will be the relative density of the object?

An object weighs $20 \mathrm{gf}$ in air,$18.2 \mathrm{gf}$ in a liquid (other than water) and$18.0 \mathrm{gf}$ in water. What will be the relative density of the liquid?