Pressure is a physical quantity that expresses the force acting uniformly on a unit area perpendicular to the surface. When force acts uniformly on a flat surface, pressure is equal to the force divided by the area:
$$p=\frac{F}{S}$$
where,
F— force acting perpendicular to the surface;
S— area over which the force is applied.
The unit of pressure in the SI system is the pascal (Pa), named after Blaise Pascal. 1 Pa is the pressure or mechanical stress generated by a force of 1 N uniformly distributed over an area of 1 m2:
$$1\mathrm{Pa}=\frac{\mathrm{N}}{\mathrm{m}^{2}}=\frac{\mathrm{kg}}{\mathrm{m}\cdot \mathrm{s}^{2}}$$
FAQ
What is pressure?
Pressure is force distributed over an area, acting perpendicular to the surface.
What is the SI unit of pressure?
The SI unit is the pascal, equal to one newton per square meter.
Why is pressure important?
It is used in physics, engineering, fluid mechanics, and many measurement devices.
