Bernouilli principle and airplanes?

Question

I'm really not sure how to approach this problem...

An airplane has a mass of 2.0 x 10^6 kg, and the air flows past the lower surface of the wings at 95 m/s. If the wings have a surface area of 1200 m^2, how fast must the air flow over the upper surface of the wing if the plane is to stay in the air? Consider only the Bernoulli effect.

Thanks.

Answer 1

The pressure difference that would hold the aircraft up is:
F/A = mg/A .

You then apply Bernoulli's Equation for pressure.
There is no static pressure difference as z1 = z2
so you have just the two terms: the velocity and the pressure.
Substiute your values in the equation and solve for the second velocity.

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