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If a wire is stretched to double of its length.What will be the strain

  1. Jan 18, 2012 #1
    If a wire is stretched to double of its length.What will be the strain of wire?I need to prove it mathematically that how it becomes 1.
     
  2. jcsd
  3. Jan 18, 2012 #2

    sophiecentaur

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    Re: Strain

    Welcome
    What is the basic definition of strain?
    Look it up and put the values for initial and final length in the formula.
     
  4. Jan 18, 2012 #3
    Re: Strain

    Thanks you sir.
    Basic definition is:Change in length/original length.So change in length is 2l.And original length is l.So it becomes 2.While the correct answer to this statement is 1.
     
  5. Jan 19, 2012 #4
    Re: Strain

    You've got something messed up here.

    The CHANGE in length. So, what is the final length? 2I. What's the initial? I.
    CHANGE = FINAL LENGTH - INITIAL LENGTH
    2I is not the change. Keep that in mind and try the equation again. See what you get.
     
  6. Jan 19, 2012 #5
    Re: Strain

    Thanks you very much!Got it.
     
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