Question

A pressure of $2{\text{Nm}}^{-2}$ is applied over a surface area of $4m^2$. Calculate the total force acting on the surface.

• A. $8\text{N}$
• B. $4\text{N}$
• C. $10\text{N}$
• D. $2\text{N}$

Answer 1

The correct option is A $8\text{N}$

Pressure, $P=2N{m}^{-2}$
Force acting on surface $=F$
Surface area $=4{\text{m}}^2$
Pressure $=\left(\frac{Force}{Area}\right)$
$P=\left(\frac{F}{A}\right)$
$2=\left(\frac{F}{4}\right)$
$F=8\text{N}$