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A Physics Question

  1. Jan 21, 2006 #1
    An airplane has a mass of 1.60 x 10^4 kg and each wing has an area of 40.0 m^2. During level flight, the pressure on the lower wing surface is 7.00 x 10^4 Pa.
    a) Determine the pressure on the upper wing surface.
    b) Determine the lift force on the plane. Is it sufficient to lift the plane?:confused:
     
  2. jcsd
  3. Jan 21, 2006 #2
    What sort of work have you done so far?
     
  4. Jan 22, 2006 #3
    Answer

    Well.. i get 68.0kPa
    but my reasoning doesnt make sense.. i got confused and lost:confused:
     
  5. Jan 22, 2006 #4
    The force on the bottom of the wing is equal to the plane's weight plus the force due to the pressure above the wing. Plugging in the numbers, i got 66 kPa.
    The second part makes no sense to me. "Is it sufficient to lift the plane?" Well its flying, isn't it? ...
     
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