Consider the internal shoe brake of Fig. 6-13. Pivot for shoe is located 4 in. below the center and 1.75 in. to the left of the vertical through the center. Radius of the drum is 5.5 in. Width of the lining is 2.25 in. Arc of lining is 90° starting at 18° CW from the shoe pivot. Maximum lining pressure is 90 psi. Coefficient of friction is 0.30. Horizontal actuating force is 4 in. above the center. Drum rotates CW. Find the value of the actuating force P and torque exerted by the brake.
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