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Homework Help: Dynamics Problem (rigid body)

  1. Apr 28, 2010 #1
    Not really sure if this is where this should be but oh well.

    1. The problem statement, all variables and given/known data
    Image attached.

    It is given that:

    b = 200 mm
    mass = 6 kg

    Find the tension in cable A immediately after cord B is cut.


    2. Relevant equations
    Moment = I*alpha + m*a*d
    F = ma?


    3. The attempt at a solution
    I tried to do
    Moment about A = I*alpha (second part is zero?) , so 9.81*6*.1 = 1/6*6*2*.2^2*alpha

    I then solved for alpha.

    And plugged it into:
    Moment about G(center) = I*alpha, but this is wrong and I don't really understand why to be honest with you. It trips me up when the forces are not perpendicular to the center for some reason.

    The final answer is T = 23.5 N.

    Thanks.
     

    Attached Files:

  2. jcsd
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