The amount of pressure inside a body of liquid increases with depth.At greater depths,the weight of liquid is greater.Hence,the pressure is greater.Liquid pressure formula:p= height(m) x Density of liquid x gravitational field strength
Pressure in liquid depends only on the vertical height of the liquid column and the,not the volume & the cross-sectional area/shape of the column.Hence,at equilibrium,the liquid level in all the columns is at the same height.
We learned hydraulic action in Geography and we're gonna learn about hydraulic machines in Physics..Hydraulic machines enable heavy objects like cars to be lifted with a small amount of effort.They use liquids to transmit pressure.Pressure is applied to an enclosed liquid,the pressure is transmitted equally to all other parts of the liquid.(Pascal's Principle)
