Verified answer

* BY APPLYING LUBRICANTS

* POLISHING THE SURFACE

* USING BALL BEARING

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HERE IS YOUR ANSWER

• Friction can be reduced by making the surface smooth by polishing.
• Friction can be reduced by app

• lying lubricants (like oil or grease) to the rubbing surface.

• Friction can be reduced by using wheels to move objects.

• Friction can be reduced by using ball bearing between the moving parts of machine.

HOPE IT'S CLEAR TO YOU

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