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Homework Help: Boundry conditions on a string

  1. Oct 8, 2006 #1
    Two strings with identical mass densities and tensions are attached in the middle by a mass m, an incident pulse is traveling from the left, I need to find the equations of motion for the string on the right.

    The pulse is y=Aexp[i(kx-wt)]

    work so far:
    the mass will act as a moving boundry condition because of the verticle component of the string. So i have m(d^2y/dt^2)=-T dy/dt, i am having trouble in where to go next, can anyone help?
  2. jcsd
  3. Oct 11, 2006 #2

    Meir Achuz

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    Draw an old fashioned FBD of the forces on the mass.
    This will give you a BC relating dy/dx for each string.
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