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Pressure on an airplane

  1. Dec 8, 2009 #1
    1. The problem statement, all variables and given/known data
    Consider an airplane of wing area 29 m^2 (both wings combined) flying through air of density0.549 kg/m^3 . From the plane’s point of view, the air flowing above the plane’s wings has
    speed 178 m/s , but the air flowing below the wings has speed 140 m/s . What is the net upward lift force on the plane? Assume laminar air flow both above and below the plane’s wings. The plane is flying horizontally. Answer in units of kN.


    2. Relevant equations
    Pressure = F/A
    Rho= m/volume


    3. The attempt at a solution
    I am so lost, my brother was sick so I had to pick him up from school and I missed the first part of lecture where he explained this. I'm not even sure what equations I can use. PLEASE HELP
     
  2. jcsd
  3. Dec 9, 2009 #2

    ehild

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    Gold Member

    Have you heard about Bernoulli' principle?

    ehild
     
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