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Homework Help: Power required to generate a wave

  1. Feb 26, 2015 #1
    1. The problem statement, all variables and given/known data
    Linear density of mass m = 0.05 kg/m
    Tension = 80N
    Frequency, f= 60Hz
    Amplitude = 6 cm

    The question asks the power supplied to generate such wave in a string.

    2. Relevant equations
    V=√T/m
    P=1/2mvA^2w^2
    w/2pi=f
    3. The attempt at a solution
    V=(T/m)^1/2
    I calculated the angular frequency by w/2pi= f
    Then I used the power for avg power
    P=1/2A^2w^2vm
     
  2. jcsd
  3. Feb 26, 2015 #2

    haruspex

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    Your expression for P looks right to me. Do you have reason to believe your answer is wrong? If so, what do you get numerically and what should it be?
     
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