The motor A delivers 3000 hp to the shaft at 1500 rev/min, of which 1000 hp is removed by gear B and 2000 hp is removed by gear C. Determine (a) the maximum shear stress in the shaft; and (b) the angle of twist of end D relative to end 4. Use G = 12 x 106 psi for steel, and assume that friction at bearing D is negligible. A 4 in. 6 ft- B FIG. P3.35 3.5 in. 3.5 in. C 4 ft 2 ft D 2 ft +