question_answer

A drawing pin is pushed against a wooden table with a force of 10 N. Calculate the pressure exerted by the pin at a point on the table, if area of the point is \[0.01\text{ }c{{m}^{2}}\]

Answer:

\[F=10\text{ }N\] \[A=0.01c{{m}^{2}}=\frac{0.01}{10000}{{m}^{2}}\] \[=\frac{1}{10,000\times 100}{{m}^{2}}=\frac{1}{{{10}^{6}}}{{m}^{2}}={{10}^{-6}}{{m}^{2}}\] \[\therefore \]\[P=\frac{F}{A}=\frac{10}{{{10}^{-6}}}Pa=10\times {{10}^{6}}Pa={{10}^{7}}Pa\]