Methods to reduce frictional losses -
1. USING OF LUBRICANTS like POWDER,KEROSENE OIL ETC.
2. By using Ball bearings which change sliding friction to rolling friction
3. Polishing or smoothens a surface.
1)Using grease, oil, wax and lubricants in machinery parts to reduces
2) leavers is also reduces the friction
3) engine oil, gear oil, clutch oil, etc