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Homework Help: Mechanical Waves speed

  1. Nov 20, 2011 #1
    1. The problem statement, all variables and given/known data

    When a mass M hangs from a vertical wire of length L, waves travel on this wire with a speed V.

    a) What will be the speed of these waves in terms of V if we double M without stretching the wire?


    Good morning, could someone please tell me why my answer of rad 2 is wrong. I thought i was on the right track.

    2. Relevant equations

    See uploaded photo of all work

    3. The attempt at a solution

    see uploaded photo of all work

    Attached Files:

  2. jcsd
  3. Nov 20, 2011 #2
    The speed of a wave along a stretched string depends on the tension in the string and the mass per unit length.

    v = √(T/μ) where T = tension in the string and μ = mass per unit length.
    Can you get it from this??
    What do you mean by rad2....
  4. Nov 20, 2011 #3
    Do you mean root2 (√2) ?????
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