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Homework Help: Find force on a wall

  1. Feb 17, 2009 #1
    Air within the funnel of a large tornado may have a pressure of only 0.46 atm.
    What is the approximate outward force F on a 6.2m x 5.5m wall if a tornado suddenly envelopes the house? Atmospheric pressure is 1.013 x 10^5 Pa. Answer in units of N.

    I know that P= F/A, so F=PA. I tryed just multiplying the pressure and area, but that was not correct. I also tried converting atms to Pa and then multiplying; however, that was also incorrect.

    Help me, please.
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Feb 17, 2009 #2


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    Homework Helper

    Welcome to PF.

    What pressure did you use to find the force?
  4. Feb 17, 2009 #3
    .46 atm.
    I mulitiplied .46 and 1.013 x 10^5 to convert atm to Pa. And I got 46598 Pa and then mulitiplied that by 34.1 m^2 (6.2m x 5.5m) to solve for the force.
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