Question

When the eraser presses on a paper with a force of $1$ N the paper experiences a pressure of $10,000$ Pa. Find the area of contact between the eraser and the paper.

• A. $1c{m}^3$
• B. $10c{m}^2$
• C. $1c{m}^6$
• D. $1c{m}^2$

Answer 1

The correct option is D $1c{m}^2$

Force = 1N

Pressure = 10000 Pa

Since Pressure = $\frac{Force}{Area}$

Area = $\frac{Force}{Pressure}=\frac{1}{10000}{m}^2$

= ${10}^{-4}{m}^2$

Area = 1 ${cm}^2$