Suggest two methods of improving the efficiency of a machine.
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Lubricating the moving parts
And making sure that the moving parts that have to be lifted are not very heavy
1. Increasing its mechanical advantage
2. Decreasing its velocity ratio
Reducing friction between moving parts.
By reducing friction e. g oiling or greasing the moving parts of the machine
By using movable parts of a machine made of light materials
1. Lubricating movable parts of the machine to reduce friction
2. Using Rollers for an inclined plane
3. Reducing the angle of elevation for an inclined plane
4. Using light materials for the parts that have to be lifted by the machine