Question

A piston above a liquid in a closed container has an area of 1m^2. The piston carries a load of 350 kg. What will be the external pressure on the upper surface of the luquid?

Answer 1

Pressure is =  Force / Area

Force is = 350 kg ,  Convert it to weight in Newtons.

F = mg,        g = 9.8 m/s²

F = 350 * 9.8 = 3430 N

Area = 1 m²

Pressure, P =  3430 N / 1 m²

Pressure P = 3430 N/m²  or 3430 Pascals.