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Homework Help: Transverse wave pulse

  1. May 4, 2007 #1
    1. The problem statement, all variables and given/known data

    whichone.jpg


    2. The attempt at a solution

    i thought it was number one...as we have -4.5m/s in the equation indicating that the pulse is moving in the negative direction.. i submitted the answer.unfortunately it was incorrect..

    Can you help me with this..if possible.
     
    Last edited: May 4, 2007
  2. jcsd
  3. May 4, 2007 #2
    What about number 7? The dimensions are wrong in number one, because you have [itex]x^2 - vt[/itex], so [itex]x^2[/itex] has units of [itex](ms^{-1})^2[/itex] and vt units of [itex]ms^{-1}[/itex].
     
  4. May 4, 2007 #3
    Thank you Nylex for ur help....i submitted the answer (number 7)but.....--->its wrong.
    i thought again about the dimensions..i found that number two also has correct dimensions. i submitted it..and its correct.
    my reasoning (not sure if it's correct)..that the negative outside the bracket when multiplied but +4.5t,becomes negative ..indicating the negative direction of the pulse.



    Correct solution (Number 2)
     
    Last edited: May 4, 2007
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