Question

A brick weighing $40N$ having dimensions of $25cm\times 10cm\times 5cm$ is kept on a table with its three different sides one by one. Calculate the pressure exerted in each of the three cases

Answer 1

$P=\frac{F}{A}$

$\left(i\right)$ Taking base as $25cm\times 10cm$

$P=\frac{40}{250\times {10}^{-4}}=1.6kPa$

$\left(ii\right)$ Taking base as $25cm\times 5cm$

$P=\frac{40}{125\times {10}^{-4}}=3.2Pa$

$\left(iii\right)$ Taking base as $10cm\times 5cm$

$P=\frac{40}{50\times {10}^{-4}}=8kPa$