In the power transmission system shown in Figure a 1 hp electrical motor is connected to a spur gear set which the pressure angle is 20 and the diametral pitch is 10 teeth/in. In the spur gear set, the pinion has 20 teeth and is rotating 1200 rpm clockwise. The gear has 40 teeth and it is connected to a bevel gear set which the pressure angle is 20, the diametral pitch is 12 teeth/in and the face width is 0.5 inch. In the bevel gear set, the pinion has 18 teeth and the output gear has 36 teeth. (Dimensions are in inches). (a) Draw the free body diagram of shaft CD while the trust force is taken out at D. (b) Determine the magnitude of all bearing reaction forces at C and D. A Y 3" C B D 3" F E ---- I