Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Pressure is the amount of force applied at right angles to the surface of an object per unit area. The symbol for it is "p" or P.
The IUPAC recommendation for pressure is a lower-case p.However, upper-case P is widely used.
The usage of P vs p depends upon the field in which one is working, on the nearby presence of other symbols for quantities such as power and momentum, and on writing style.

Mathematically:

P=f/a
where:

p is the pressure,
F is the magnitude of the normal force,
A is the area of the surface on contact.
SI unit: Pascal
In SI base units: 1 N/m2, 1 kg/(m·s2), or 1 J/m3
Derivations from other quantities: p = F / A
Dimension: M L−1 T−2
between 45-80 psi
Normal water pressure range
more... [en.wikipedia.org]

i don't like physics too but i like pressure!

.هر چه سطح شما کمتر باشد ، فشار وارده به شما بیشتر میشود
-aboo