Question

A fly was sitting on a block. A man draws a circle of the area ${2cm}^2$, enclosing the fly. He then applies a force of $20N$ and kills it with a flat stick. Calculate the pressure on that area.

• A. ${10}^{2}Pa$
• B. ${10}^{3}Pa$
• C. ${10}^{5}Pa$
• D. ${10}^{7}Pa$

Answer 1

The correct option is C

${10}^{5}Pa$

The area on which the pressure is calculated is ${2cm}^2$, and the force applied by the stick is 20 N in order to kill the fly sitting in that area.
So, pressure = $\frac{Force}{Area}$
$[{2cm}^2=2\times$ ${10}^{-4}$ $m^2]$
So, $\text{pressure}=\frac{20}{2\times {10}^{-4}}$ = ${10}^{5}Pa$