Question

A block weighing $400\text{N}$ is placed on the ground. Calculate the pressure exerted by the block on the ground?

• A. $20{\text{Nm}}^{-2}$
• B. $4{\text{Nm}}^{-2}$
• C. $400{\text{Nm}}^{-2}$
• D. $40{\text{Nm}}^{-2}$

Answer 1

The correct option is D $40{\text{Nm}}^{-2}$

Weight of the block $=400\text{N}$
Length of the block, $L=5\text{m}$
Width of the block, $W=2\text{m}$
Area covered by the block $=L\times W=5\times 2=10{\text{m}}^2$
Pressure by bock on the ground $=\left(\frac{\text{Weight}}{Area}\right)$
$=\left(\frac{400}{10}\right)$
$=40{Nm}^{-2}$