A block brake with a short shoe is to be designed for a pV value of 55,000; μ is equal to...

A block brake with a short shoe is to be designed for a pV value of 55,000; μ is equal to 0.2; the area of the shoe is 18 in.2; and the diameter of the brake drum is 16 in. A cable drum 12 in. in diameter is connected to the brake drum by means of gearing. The brake drum revolves three limes as fast as the cable drum. See Fig. 1. Find the uniform velocity at which a 1000-lb weight at the end of the cable is being lowered. Find the value of the pressure of the shoe.

Figure 1