Question

what is pressure? what its SI unit?

Answer 1

It is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
It's SI unit is pascal.

Answer 2

$\textbf{ANSWER}$


• PRESSURE :

The force exerted perpendicularly on a unit area is called 'Pressure'.


• UNIT OF PRESSURE :

The SI unit of force is Newton (N). Area is measured in m². Therefore, the SI unit of pressure is N/m². It is known as Pascal (Pa). In atmospheric science, the unit for pressure is bar 1 bar = 10^5 Pa. Pressure is a scalar quantity.

If area increases, pressure reduces for the same force, and if the area decreases, the pressure increases for the same force.

For example, due to natural adaptation the bottom surfaces of camel's feet are broad. Hence the camel's weight is exerted on a large area and the pressure on the sand is reduced. This is why camel's feet do not penetrate into the sand and it becomes easy to walk.