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Sound Waves Traveling Down a String

  1. Apr 27, 2012 #1
    1. The problem statement, all variables and given/known data

    A brother and sister try to communicate with a string tied between two tin cans. If the string is 9.5m long, has a mass of 55g and is pulled taut with tension 6N, how much time does it take for a wave to travel from one end of the string to the other?

    2. Relevant equations

    v=√(F/M)
    M=mass/length
    t=d/v

    3. The attempt at a solution

    First, I converted 9.5m to 950cm and 55g to .055kg
    I used these to find M=.055/950
    M=5.7* 10^-5
    I used F=6N and divided that by M, then took the square root and i got
    v=321.96
    then I divided 950 by 321.96 in order to get the time, and got
    t=2.95 but this is incorrect.
     
  2. jcsd
  3. Apr 27, 2012 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Why? Meters is the units you want.
     
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