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Homework Help: Waves on a string

  1. Jun 20, 2007 #1
    1. The problem statement, all variables and given/known data
    Consider a string of length L tied down at both ends to fixed points on opposite walls. We are going to pluck the string and make standing waves of a certain fundamental frequency. In order to increase the frequency of the fundamental, which of the following parameters can be varied to accomplish this?
    True False use a thinner string
    True False increase the length of the string
    True False loosen the string
    True False use a thicker string
    True False tighten the string
    True False decrease the length of the string

    3. The attempt at a solution
    My answers are in bold, not sure what im doing wrong, the computer program doesnt tell me:rolleyes: but can anyone help me out?

  2. jcsd
  3. Jun 20, 2007 #2
    i got those answers from reading through the chapter, any1 know what im doing wrong?
  4. Jun 20, 2007 #3


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    WHat's the formula for teh fundamental frequency? (in terms of the length, the linear mass density, the tension, etc)
  5. Jun 21, 2007 #4


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    Your answers look good to me, except for the last one.
  6. Jun 21, 2007 #5


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    Second one is also wrong - increasing the length will decrease the fundamental frequency. That is it will vibrate at a lower frequency, if everything else is kept the same.
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