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Math Help - im not sure if this belongs here

  1. #1
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    im not sure if this belongs here

    But i came across this problem and i cant seem to understand how to answer.

    Pressure = force / unit area

    Pressure = weight / unit area

    The weight i was told to use was 175bs.

    Scenario - you are standing on one square foot-12" on a side.

    1) What is your pressure in pounds per square inch
    2) Compare your pressure in psi to that of the atmosphere. Which is greater?
    Last edited by johnq86; February 17th 2008 at 08:24 AM. Reason: wrong nymber
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  2. #2
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    Quote Originally Posted by johnq86 View Post
    But i came across this problem and i cant seem to understand how to answer.

    Pressure = force / unit area

    Pressure = weight / unit area

    The weight i was told to use was 235lbs.

    Scenario - you are standing on one square foot-12" on a side.

    1) What is your pressure in pounds per square inch
    2) Compare your pressure in psi to that of the atmosphere. Which is greater?

    1 sq foot =144 sq inches
    so, take 235/144 which equals 1.63194...
    assuming that the weight is distributed equally the psi would be approx. 1.63
    the psi of the atmoshere is 14.7. which is slightly over 1 ton per square foot
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  3. #3
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    how do u figure out the

    psi of the atmosphere?
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  4. #4
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    the psi of the atmosphere?

    the psi of the atmosphere is dependent upon your position within the atmosphere. at sea level there is a lot more air pressure than if you were standing at the top of a tall mountain.
    atmospheric pressure is measured with a barometer.
    so, when you ask how do i find the psi of the atmosphere it is almost like asking how do i calculate temperature .
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  5. #5
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    i meant 2 say

    how did u come aobut this..the psi of the atmoshere is 14.7. which is slightly over 1 ton per square foot
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  6. #6
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    Quote Originally Posted by johnq86 View Post
    how did u come aobut this..the psi of the atmoshere is 14.7. which is slightly over 1 ton per square foot
    Atmospheric pressure - Wikipedia, the free encyclopedia
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