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Homework Help: Cross sectional area

  1. Jun 27, 2007 #1
    1. The problem statement, all variables and given/known data
    I'm working on a problem that is asking me to find Young's Modulus. I have the right formula and everything that I need but I can't seem to figure out how to find the cross sectional area of a nylon rope. The rope is 21 m long and 1.4 cm in diameter.

    2. Relevant equations

    3. The attempt at a solution

    Would the cross sectional area be the area: pi(0.7)^2
  2. jcsd
  3. Jun 27, 2007 #2

    Doc Al

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    Staff: Mentor

    Assuming that it has a circular cross-section (a reasonable assumption), then the area would be that of a circle ([itex]\pi r^2[/itex]). But be sure to use standard units for the radius.
  4. Jun 27, 2007 #3


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    Science Advisor
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    Gold Member

    yes (but be careful witt the units. This will be in cm^2. You might need to put it in m^2)

    EDIT: Doc Al beat me to it :-)
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