A simple gear train has 2 spur gears. The input gear has 20 teeth and the output gear has 100 teeth. The input rotates at 2000 rev/min clockwise. Calculate the gear ratio and the output speed. (5 and 400 rev/min anticlockwise). The input torque is 15 Nm and the efficiency is 65 %. Calculate the output power and the holding torque. (2042 W and 33.75 Nm clockwise)