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Homework Help: Suspended Rod

  1. Oct 17, 2009 #1
    1. The problem statement, all variables and given/known data

    A rod of length 69.0 cm and mass 1.70 kg is suspended by two strings which are 43.0 cm long, one at each end of the rod.


    (A) The string on side B is cut. Find the magnitude of the initial acceleration of end B.

    The string on side B is retied and now has only half the length of the string on side A.


    (B) Find the magnitude of the initial acceleration of the end B when the string is cut.

    2. Relevant equations

    3. The attempt at a solution

    A bit lost on even how to solve this one. Any assistance would be appreciated. Thanks.
    Last edited by a moderator: Apr 24, 2017
  2. jcsd
  3. Oct 17, 2009 #2


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    Gold Member

    Assuming no air resistance
    Fg = (m)(g)
    Fg = (1.70kg)(9.8m/s^2)
    Fg = 16.6

    a = Fnet/m
    a = 16.6/1.70
    a = 9.8 m/s^2

    Think that's right...?
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