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Homework Help: Youngs modulus for a wire

  1. Nov 16, 2008 #1
    1. The problem statement, all variables and given/known data
    A wire of length 4.97 m with a cross-sectional area of 0.101 cm2 stretches by 6.53 mm when a load of 0.92 kN is hung from it. What is the Young's modulus for this wire?

    2. Relevant equations
    (F/A) = Y(Change in Length/Initial Length)

    3. The attempt at a solution

    (920 N)(4.97m)/(.00653m)(.0000104 m^2) = 6.73283E10

    I can't seemt to figure out what I am doing wrong... Is that answer not in Pa?
  2. jcsd
  3. Nov 16, 2008 #2


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    Homework Helper

    Hi JJones_86,

    In the problem statement it says the area is 0.101 cm2, but in your calculation you use 0.104cm2. Which one is correct?
  4. Nov 16, 2008 #3
    LOL, well that was my problem then. For some reason I wrote down .104 cm... After correcting it, I got the right answer. Thanks!
  5. Nov 16, 2008 #4


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    Homework Helper

    Glad to help!
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