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Maximum Load on a Copper Wire

  1. Oct 26, 2009 #1
    1. The problem statement, all variables and given/known data

    (a) Copper has a breaking stress of about 3.00×108 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.37 mm?

    (b) If 17 percent of this maximum load is hung from the copper wire, by what fraction of its original length will it stretch?

    2. Relevant equations

    3. The attempt at a solution

    I know that this one is simple, I just can't find the correct formula to use. Anyone got any ideas?
  2. jcsd
  3. Oct 26, 2009 #2


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    (a) They give you the diameter of the wire, so you have cross sectional area. You can also assume the wire is only in tension. Do you know how to calculate stress in a wire under tension?

    (b) Given the load, can you find strain on this particular wire?
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