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What is the speed of a wave on the string?

  1. Nov 23, 2016 #1
    1. The problem statement, all variables and given/known data
    The tension in the string is 90N; the string is 60cm long and has a weight of 34.44g. What is the speed of the wave on the string?
    Answer: 396 m/s

    2. Relevant equations
    v = √ T / (m/L)

    3. The attempt at a solution

    v = √ 90N / (0.0344kg/0.6m)
    v = 39.6 m/s

    Huh? This looks like it should be pretty simple, plug in and get the answers....
    What am I doing wrong, i need one more digit!!??
     
  2. jcsd
  3. Nov 23, 2016 #2
    Your solution looks correct to me.

    I once had a physics teacher who would dig through the questions and solutions so he could assign all of the ones that were wrong. A lot to be learned that way (like which professor never to sign up for again!)
     
  4. Nov 24, 2016 #3
    The answer is 39.62 m/s, there must be a mistake in the given or answer!! check you prof.
     
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