Answers

2014-10-30T19:33:08+05:30
You can grease, oil or use ball bearings. Greasing is done in heavy machinery while oiling is done in light machinery. Ball bearings reduce friction by not letting each other to rub, but let the balls roll and smoothen the movement.
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2014-10-30T20:41:23+05:30
Apply greese, oil the objects or other lubricants to reduce energy loss due to friction paintng ,or give particular shape ie streamlined shape to
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