Question

What is/are the units of measurement of pressure?

• A. $N/m^2$
• B. Pascal
• C. Bar
• D. Torr
• E. All of these

Answer 1

The correct option is E All of these

Pressure = $\frac{Thrust}{Area}$
SI unit of thrust (N) and area $\left(m^2\right)$ in the above relation, we get $\frac{newton}{metr{e}^2}or\frac{N}{m^2}$
$\frac{N}{m^2}$ is also given a specific name which is "pascal" (Pa) in honour of the scientist, Blaise Pascal.
$\therefore 1pascal=1newton/metr{e}^2$
or $1Pa=1N/m^2$
Some non SI units of pressure that are commonly used are:
1. 'bar' (equal to 100 kilo pascals)
2. 'torr' (named after Italian physicist Evangelista Torricelli).1 torr = 133.33 Pa.