Question

A force of $145\text{N}$ results in a pressure of $12.5\text{Pa}$ on an object. Calculate the area of contact in ${\text{m}}^2$.

• A. 11.6

Answer 1

The correct option is A 11.6
Given:
Force, $\text{F}=145\text{N}$
Pressure, $\text{P}=12.5\text{Pa}$

Pressure $\left(\text{P}\right)$ is define as the the force $\left(\text{F}\right)$ acting on a body per unit area.

$\text{P}=\frac{\text{F}}{\text{A}}⟹12.5=\frac{145}{\text{A}}$
$⟹\text{A}=\frac{145}{12.5}=11.6{\text{m}}^2$
$\therefore$ The area of contact is $11.6{\text{m}}^2$