What is Fluid Pressure?
The force can be applied in any direction with respect to the surface of solids. But in fluids, the force may be applied at a right angle (or perpendicular) to the liquid surface. This is because fluids (liquids and gases) at rest cannot sustain a tangential force. Therefore, we state the pressure acting on the fluid instead of force.
The pressure (P) is defined as the magnitude of the force acting perpendicular to the surface of an object per surface area of the object. If a constant force of magnitude F acts normally on a surface area A, then pressure acting on the surface is given by,
P = Force (F) / Area (A)
Fluid Pressure
Liquids and gases play an important role in our life. The earth’s atmosphere is so big as it appears like an ocean of gases. About 76% of the surface of the earth is covered with water. We cannot think of a life without gases (air) and water, Liquids are collectively known as fluids. A substance that flows under the action of an applied force and does not have a shape of its own is known as a liquid. The study of fluids which is at rest is known as hydrostatic or fluid statics. The study of hydrodynamics. In this article, we will have the study of liquids only.