The door and the seals on an aircraft are subject to a tremendous amount of force during flight. At an altitude of 10,000 m (about 33,000 ft), the air pressure outside the airplane is only 2.7 x 104 N/m2, while the inside is still at normal atmospheric pressure, due to pressurization of the cabin. Calculate the net force due to the air pressure on a door of area 3.0 m2

Answer 1

F = 2.7*10^4N/m^2 * 3m^2 = 8.1*10^4N.