For an open-belt drive transmitting 4 kW, the distance between the centre of pulley 'A' and the centre of pulley 'B' is 100 cm. Diameters of pulleys A and B are 30 cm and 20 cm respectively. The...

For an open-belt drive transmitting 4 kW, the distance between the centre of pulley 'A' and the centre of pulley 'B' is 100 cm. Diameters of pulleys A and B are 30 cm and 20 cm respectively. The coefficient of friction between belt and pulley is 0.2. The pulley A is rotating at 200 rpm. If the permissible tensile force per cm width of belt is 180 N, determine the width of the belt necessary.