Question

What is the unit of pressure?

• A. $N{m}^{-2}$
• B. $N^{2}m$
• C. Nm
• D. $N{m}^{-1}$

Answer 1

The correct option is A

$N{m}^{-2}$

Pressure is defined as force per unit area.
Unit of force is Newton (N) and unit of area is $m^2$.
$\therefore$Unit of pressure is $N{m}^{-2}$.
1 $N{m}^{-2}$ = 1 pascal.