Question

On a circlular area ${2cm}^2$, a person applies a force of $20N$. is the pressure on that area.

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

Answer 1

The correct option is D ${10}^{5}Pa$

The area on which the pressure is calculated is ${2cm}^2$, and the force applied is $20N$.

Pressure = $\frac{Force}{Area}$ = $\frac{20N}{2\times {10}^{-4}{m}^2}$
[$\because 1c{m}^2={10}^{-4}{m}^2$]
= ${10}^5\frac{N}{m^2}$ = ${10}^{5}Pa$