Question

A pressure of 10 Pa acts on an area of $3.0m^2$. What is the force acting on the area? What force will be exerted by the application of the same pressure if the area is made one-third?

• A. 30 N, 10 N
• B. 10 N, 30 N
• C. 15 N, 10 N
• D. 10 N, 15 N

Answer 1

The correct option is A 30 N, 10 N

If the area is $3.0m^2$, then the force would be:
$Pressure=\frac{Force}{Area}$
$Force=Pressure\times Area$
$=3\times 10$
$=30N$

If the area is made one third i.e. $\frac{3.0m^2}{3}=1.0m^2$
$Force=Pressure\times Area$
$=1\times 10$
$=10N$