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Homework Help: How much force is exerted on the roof?

  1. Nov 29, 2012 #1
    1. The problem statement, all variables and given/known data
    A hurricane wind blows across a 6.0mX15.0m flat roof at a speed of 130 km/h. Is the air pressure above the roof higher or lower than the air pressure inside the house? What is the pressure difference? How much force is exerted on the roof? If the roof cannot withstand the force, will it blow in or out?

    2. Relevant equations

    not sure

    3. The attempt at a solution
    I think you use something like Bernouli's principle but I really have no clue
  2. jcsd
  3. Nov 29, 2012 #2


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  4. Nov 30, 2012 #3
    You are looking for the dynamic pressure part of the Bernoulli equation. Pressure=Force/area
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