A force of 200 N acts normally on a surface of area 0.5 m². Calculate the pressure.

A body weighs 50 gf in air and 30 gf when fully immersed in water. Find the upthrust, the volume of the body and its relative density.

State Archimedes' principle and the law of flotation.

The relative density of a substance is 2.5. What is its density in kg m⁻³, and will it float on water?

Why is it easier to swim in sea water than in river water?

A body of volume 200 cm³ is fully immersed in water. Calculate the upthrust on it. Take the density of water as 1 g cm⁻³ and g = 10 m s⁻².

Calculate the pressure exerted at the bottom of a tank of water 5 m deep. Take the density of water as 1,000 kg m⁻³ and g = 10 m s⁻².