Chapter
8
Rotational Motion
Rotational
Equilibrium
Example
8-13
1.
Set the net force acting on the plank equal to zero:
2.
Set the net torque acting on the plank equal to zero:
3.
Note that the torque condition involves only one of the two unknowns,  .
Use this condition to solve for :
4.
Substitute into
the force condition to solve for  :
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