Tag: pressure in liquids and gases

$Pressure=\frac{Force}{Area}=\frac{Force \times Distance}{Area \times Distance}=\frac{Work}{Volume}$

Unit of Pressure, $Pa$ (in SI) is derived from the units of Force ($N$ in SI) and Area ($m^2$ in SI).
$Pa=\dfrac{N}{m^2}$
So, it is a derived unit.

$Pressure=\dfrac{Force}{Area}=Constant$

With the increase in temperature, the density of atmosphere decreases, hence the atmospheric pressure decreases.

Pressure is defined as force per unit area. The standard unit for pressure is the Pascal, which is a Newton per square meter.

$P=\dfrac{F}{A}$

Here the force acts perpendicularly on the area. 

Pressure is a measure of effect of force on an object.

Pressure can be defined as force per unit area i.e. $\dfrac{Force}{Area}$. 

The atmospheric pressure exists due to weight of the atmosphere above it. 
As the altitude increases, the amount of atmosphere above, and hence its weight, and hence the atmospheric pressure decreases.

We know that pressure is the force per unit area.