A riveting machine is driven by a motor of 3 kW. The actual time to complete 1 riveting operation is 1.5 sec and it absorbs 12 kN-m of energy. The moving parts including the fly wheel are equivalent to 220 kg at 0.5 m radius. If the speed of the fly wheel is 360 RPM before riveting then
1
The speed of the fly wheel immediately after riveting is 324 RPM
2
The number of rivets closed per minute = 15
3
The speed of the fly wheel immediately after riveting is 314 RPM
4
The number of rivets closed per minute = 10