An airplane has an effective wing surface area of 19.4 m2 that is generating the lift force. in level flight the air speed over the top of the wings is 67.0 m/s, while the air speed beneath the wings is 51.0 m/s. what is the weight of the plane?

W =23807.68 N

Explanation:

given,

surface area of wing = 19.4 m²

speed over top wing = 67 m/s

speed under wing = 51 m/s

density of air =  1.3 kg/m³

weight of plane

From Bernoulli's principle

where 1 and 2 are two different locations at the same geo potential level  

so if we call 1 the lower surface and 2 the upper surface,

we find the pressure differential, P₁ -P₂

then the force acting on the plane is

F=P A

F=1227.2 x 19.4

F =23807.68 N

weight of the plane

W =23807.68 N

power out to power in less than 100%