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Answer:
1: Rubing the surface
2: Using ball bearing
3: Using grease
Explanation:
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Explanation:
Friction can be reduced by the following ways-
1) Polishing-Friction can be reduced by making the surface smooth by polishing.
2) Lubrication=Friction can be reduced by applying lubricants (like oil or grease) to the rubbing surface.
3) Ball bearings-Friction can be reduced by using ball bearing between the moving parts of machine.
4) Streamlining– Designed with curved and sloping surfaces to cut through the air and reduce the friction.
5) ) Making surface smoother- Friction can be reduced by using wheels to move objects.
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