Explanation:
Atmospheric pressure is defined as the force per unit area that the air that forms the atmosphere exerts on the earth's surface, in this case, is the pressure exerted on the sheet of paper:
[tex]P=\frac{F}{A}\\F=PA[/tex]
The atmospheric pressure value is equal to [tex]1.01*10^5Pa[/tex]. Replacing the given values, we obtain the force exerted on one side of the paper:
[tex]F=1.1*10^5Pa(8.5*10^{-2}m*11*10^{-2}m)\\F=944.35N[/tex]
This force is exerted in both sides of the sheet of paper. Thus, the net force is zero.
