Problem A15:
In the figure below, a circular solid disk is leaning up against
a step. The radius of the disk is r=n1d. The height
of the step is h=n2d. A force of magnitude F is
applied to a rope that is attached to the top of the disk. The
rope pulls horizontally. The disk has a weight W. What is the
maximum force that can be applied such that the disk is in
static equilibrium as shown in the figure. If the maximum
force is F=W/
√ n3 ,
what is n3?
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