As a liquid is added to a beaker, the pressure exerted by the liquid on the bottom of the beaker increases compared to the liquid near at the tip of the beaker. Pressure increases as depth increases in any form of matter.
Hydraulic systems is based on the principle of Pascals principle. Pascal's principle states that " Pressure applied to the to a fluid in a closed container (at rest) is transmitted equally to every point of the fluid and on the walls of the container".
