What is pressure?

Pressure is the force applied to a unit area of a surface. It is typically measured in units such as pounds per square inch (psi) or pascals (Pa). Pressure can be exerted by gases, liquids, or solids and is a fundamental concept in physics and engineering.

Pressure is a force applied evenly over an area. It is expressed in units of Pascals (Pa) in the SI system, where 1 Pa is equal to 1 newton per square meter (N/m^2). Pressure can be caused by the weight of an overlying fluid (hydrostatic pressure), the motion of a fluid (dynamic pressure), or the force exerted by a surface (contact pressure).