posted by alistair .
An airplane has an effective wing surface area of 16 square meter that is generating the lifting force. In level flight the air speed over the top of the wings is 62m/s, while the air speed beneath the wings is 54m/s. What is the weight of the plane?
Weight = Lift
= Area*(PressureBottom - PressureTop)
= (1/2)(air density)*Area*(V2^1 - V1^2)
V2 = 62 m/s
V1 = 54 m/s
The air density depends temperature and altitude. It should be about 1.2 kg/m^3. You decide what to assume.