All About Fluid Pressure

Pressure is calculated by dividing force with the surface area it exerts on. By Pascal’s Law, pressure acting on the surface of fluid will be transmitted equally to all other points in that body. This is because the magnitude of pressure in an at rest fluid is the same in all directions. Based on this principle, we develop tools such as hydraulic jack to aid us in lifting heavy objects.

When inspecting any point in fluid, its pressure will be the summation of atmospheric pressure and the fluid pressure due to the self-weight of fluid body itself. Such pressure can be either expressed in terms of absolute pressure or gauge pressure. To measure pressure, we may use manometer or mechanical gauge.

The following shows the key information related to fluid pressure. Watch the video above for full details.