The shaft is driven by a motor and has a step and fillet at B. The motor delivers 8 hp at 1000 rpm. The gear at C delivers 60% of the power and the gear at D delivers 40%. From A to B, the diameter is 1.5 in., from B to D the shaft is 0.75 in. The fillet radius is r = 0.1 in Determine the maximum shear stress in the shaft
