Extracted text: 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 A. Use G = 12 x 106 psi for steel, and assume that friction at bearing D is negligible. A 4 in. 3.5 in. 3.5 in. ID В C te-4 ft- | 2 ft - 6 ft-