Now we can calculate the force that the atmospheric pressure produces on a surface. Consider a living room that has a 4.

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Now We Can Calculate The Force That The Atmospheric Pressure Produces On A Surface Consider A Living Room That Has A 4 1 (479.51 KiB) Viewed 134 times

Now we can calculate the force that the atmospheric pressure produces on a surface. Consider a living room that has a 4.0 m×5.0 m floor and a ceiling 3.0 m high. What is the total force on the floor due to the air above the surface if the air pressure is 1.00 atm? SOLUTION SET UP The total force on the floor has magnitude equal to the pressure multiplied by the area. We're given 1.00 atm of pressure-that is, p=1.013×105 Pa. SOLVE The floor area is A=(4.0 m)(5.0 m)=20 m2. The magnitude F⊥​ of the total force is F⊥​​=pA=(1.013×105 Pa)(20 m2)=2.026×106 N(=4.55×105lb=228 tons )​ REFLECT This force is equal to the total weight of all the air in a column directly above the floor. It is more than enough force to collapse the floor. So why doesn't the floor collapse? Because there is an upward force on the underside of the floor. If we ignore the thickness of the floor, this upward force is exactly equal in magnitude to the downward force on the top surface, and the total force due to air pressure is zero. Part A - Practice Problem: If the room has a window with dimensions 0.75 m×1.45 m, what is the total force on the window due to the air inside? Express your answer in newtons.