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Homework Help: Beat frequency: which equation to use to find the mass of string 2

  1. Apr 12, 2012 #1
    1. The problem statement, all variables and given/known data

    Two strings of equal length, L, are each clamped at both ends and are under the same
    tension T. String 1 has a mass of 45.00 g and vibrates at a frequency of 512 Hz. String 2 is
    slightly heavier. When the two strings are plucked at the same time, beats with a
    frequency of 4.0 Hz are heard.

    (i) What is the vibrational frequency of string 2?

    (ii) What is the mass of string 2?

    2. Relevant equations
    f= sqrt (T/(m/L))/2L
    3. The attempt at a solution
    f2=508Hz (a)
    (b) I do not understand which equation is applicable to find the mass
    Last edited: Apr 12, 2012
  2. jcsd
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