A drum brake with only two pads has failed and the technician believes the secondary pad has been replace with a substitute that can't handle the pressure. The details for the system are as follows: face width$=\mathrm{.}5$in$,$ coefficient of friction $=\mathrm{.}3,$ distance from center of rotation to contact of the brake pad$=6in,=4\mathrm{.}5in,c=9in,$ angle difference between pad start and hinge pin$=0$ deg, total angle for creating the brake pad$=130$ deg, and the total allowable pressure of the system is $10,000.$

What is the moment of frictional forces?