Question

Name and define the SI unit of Pressure.

Answer 1

Hint:
Since the SI unit of the pressure is given by Pascal. It can be expressed as-
One Pascal is equal to the pressure exerted by the force of a magnitude one Newton perpendicularly upon an area of one square meter.

Complete step-by-step answer:
Pressure is the quantity which can be measured using various units like atm, bar.
But In SI unit Pressure is measured by the Pascal.
Pressure; It is the amount of force applied perpendicular to the surface of an object per unit area and It is represented by the ‘P’
Pa = $\dfrac{N}{{{m^2}}}$
Or it can also written as
 Pa = $\dfrac{{kg}}{{m{s^2}}}$
Here F = Force perpendicular to the surface
And A = Area
So one Pascal can be defined as
One Pascal is equal to the pressure exerted by the force of a magnitude one Newton perpendicularly upon an area of one square meter.
Or in a simple way it can be written as One Newton per square meter known Pascal Or numerically it can be written as
1 Pa = 1 $\dfrac{N}{{{m^2}}}$
Or 1 Pa = 1 $\dfrac{{kg}}{{m{s^2}}}$
Where N is in Newton
m is equal to the meter
Kg = is the kilogram
s = is the second

Note:
Pascal is also a unit of stress. It is symbolically denoted by the ‘Pa’. This unit was named after Blaise Pascal.
Where $1 Pa = 9.869 \times 10^{-4}$
In terms of bar, 1 Pa is equal to the $10^-5$ bar
Pascal is a so-called coherent derived unit in the SI system with a special name and the symbol.