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What is the fundamental frequency of the string?

  1. Apr 20, 2009 #1
    One of the harmonics on a string 1.4 meters long has a frequency of 18.4 Hz. The next higher harmonic frequency is 23.9 Hz.

    (a) What is the fundamental frequency of the string?
    f1 = Hz *
    5.5 OK

    (b) What is the speed of the waves on the string?
    v = m/sec

    the URL:https://wug-s.physics.uiuc.edu/cgi/cc/shell/DuPage/Phys1201/spring/tma.pl?Ch-14-Waves/wt_fundamental#pr [Broken]

    I found the frequency, but im just a little confused on how to find the speed. i know i have to use the equation: v=hf. but im just confused on how to find wavelength... wavelength is the distance it takes to complete a full cycle correct? i dont know where im going wrong in my calculations
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 20, 2009 #2


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    You know the difference between the frequencies of successive harmonics is 5.5 Hz. This difference is a function of v and L, and you already know L.

    (Hint: Use ω = nπv/L, you have to convert the angular frequency here to Hertz)
    Last edited: Apr 20, 2009
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