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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.

    http://schubert.tmcc.edu/res/msu/physicslib/msuphysicslib/20_Rot2_E_Trq_Accel/graphics/prob13a_1016full.gif

    (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.

    http://schubert.tmcc.edu/res/msu/physicslib/msuphysicslib/20_Rot2_E_Trq_Accel/graphics/prob13b_1016half.gif

    (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

    Monocerotis

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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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