Question

The wing of an airplane has an average cross-sectional area of 13 m2 and experiences a lift force of 78,000 N. What is the average difference in the air pressure between the top and bottom of the wing?

Answer 1

The lift force

$$F=\Delta P\times A$$

So, the average difference in the air pressure between the top and bottom of the wing

$$\Delta P=\frac{F}{A}=\frac{78\:000\:\rm{N}}{13\:\rm{m^2}}=6000\:\rm{Pa}=6\:\rm{kPa}$$