A transmission shaft is supported on two bearings which are 1m apart.Power is supplied to the shaft by means of a flexible coupling, which islocated to the left of left hand bearing. Power is transmitted from theshaft by means of a belt pulley, 250 mm diameter, which is located at adistance of 300 mm from the left hand bearing. The mass of the pulley is20 kg and the ratio of belt tension on tight and slack sides is 2:1. The belttensions act vertically downward. The shaft is made of steel with yieldstress 300N/mm² and the factor of safety is 3. Determine the shaftdiameter, if it transmits 10 kW power at 360 rpm from the coupling tothe pulley.