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Homework Help: Force to Pascals

  1. Apr 13, 2010 #1
    1. The problem statement, all variables and given/known data



    In my chemistry class we have been given a formula:

    force/area = Newton/m^2 = kg/ms^2 = pascal

    Often I find a problem given the following info and answer:

    what is the pressure exerted by someone weighing 145lbs with contact area of 300 cubic cm?

    Now the formula dealing with Kg (145lbs = 65.8 kg) also has time involved with it.

    How do apply this eqn. to obtain an answer in pascals?

    2. Relevant equations

    I can only apply force/area

    3. The attempt at a solution

    I'm making mistakes as I go...I'll get back with a closer one quickly!

    Book says:
    21.5 x 10^3 pa
     
  2. jcsd
  3. Apr 13, 2010 #2

    berkeman

    User Avatar

    Staff: Mentor

    The contact area cannot be in units of cubic cm. That is a measure of volume.

    Don't worry about the time units in the force equation, just stick with forces and areas to calculate pressure. Be careful with your units, and you should get the right answer.
     
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