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Homework Help: Graphing Triangular Wave

  1. Sep 7, 2010 #1
    1. The problem statement, all variables and given/known data

    A triangular wave pulse on a taut string travels in the positive x-direction with speed v. The tension in the string is F, and the linear mass density of the string is u. At t = 0, the shape of the pulse is given by:

    y(x,0) = 0 if x < -L
    h(L + x)/L for -L < x < 0
    h(L - x)/L for 0 < x < L
    0 for x > L

    3. The attempt at a solution

    I don't really know where to start, I'm having problems interpreting the question; what does L represent? What is the h function?
     
  2. jcsd
  3. Sep 7, 2010 #2
    Bump; anyone?
     
  4. Sep 7, 2010 #3

    ehild

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    Plot the function. You will see what L is.

    What is the question in the problem?

    ehild
     
  5. Sep 8, 2010 #4
    how can i plot the function if i don't know what L is?
     
  6. Sep 8, 2010 #5

    ehild

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    Choose the scaling of x to be L and h of y.

    ehild
     

    Attached Files:

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  7. Sep 8, 2010 #6
    Thanks;

    Also, why is it that the power during the interval [-1,1] is constant?
     
  8. Sep 8, 2010 #7

    ehild

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    What power? And why [-1,1]? Copy the whole problem, please. What is the question?
     
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