59. Problem 13.56P (HRW) A rigid body can turn around a vertical axis until it presses
against identical rubber stoppers A and B attached to rigid walls at distances
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Solution: Click For PDF Version We draw free-body diagram of the rod. When the rod presses against the
stopper A it will experience force
For static equilibrium the vector sum of forces acting on the rod has to be zero. That is
And, the condition of rotational equilibrium is that the vector sum of torques about the axle has to be zero. That is
Solving these equations for
and
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