Question

Calculate the pressure in SI system, when a force of $100dynes$ acts on an area of $0.02c{m}^2$.

Answer 1

Step 1: Given data

Force, $F=100dynes={10}^{-3}N$ [$\because 1N={10}^{5}dynes$]

Area, $A=0.02c{m}^2=2\times {10}^{-6}{m}^2$

Pressure, $P=?$ (To be calculated)

Step 2: Calculating pressure in the SI system

Applying, $Pressure\left(P\right)=\frac{Force\left(F\right)}{Area\left(A\right)}$

$$\begin{gathered} \Rightarrow P=\frac{{10}^{-3}N}{2\times {10}^{-6}{m}^2} \\ \Rightarrow P=500Pa \end{gathered}$$

Hence, the pressure in the SI system is $500Pa$.