How much force is exerted by the atmosphere on 10.8 km^2 of land at sea level?

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justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

The pressure acting on a surface is determined by the force acting on a unit area of the surface. At sea level the standard pressure exerted by the atmosphere or 1 atm = 101325 Pa.

Pascal is a unit of pressure in terms of the force in newton and the surface area in m^2.

The force exerted by the atmosphere on a surface area equal to 10.8 km^2 can be determined by first converting 10.8 km^2 to a value in m^2.

10.8 km^2 = 10.8/(1000)^2 m^2. As the pressure exerted is 101325 Pa, 101325 = F/10.8*10^-6

=> F = 101325*10.8*10^6 N

=> F = 1094310*10^6 N

The force exerted by the atmosphere on 10.8 km^2 of land at sea level is 1094310*10^6 N

najm1947's profile pic

najm1947 | Elementary School Teacher | (Level 1) Valedictorian

Posted on

At sea level the standard atmospheric pressure = 1 bar

1 bar = 100000 pa = 100000 N/m2 = 10^5 N/m2

Area = 10.8Km^2 = 10.8*10^6 m2

Focre = Pressure * Area = 10^5*10.8*10^6 N = 1.08*10^12 N

Force exerted by the atmosphere on 10.8 Km^2 area is equal to 1.08*10^12 Newton

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