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Rigid Body Dynamics?

  • Thread starter pconn5
  • Start date
9
0
Not really sure if this is where this should be but oh well.

1. Homework Statement
683.jpg


It is given that:

b = 200 mm
mass = 6 kg

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


2. Homework 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.
 

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