Answers

2015-10-19T20:03:28+05:30
Lubricating.
ball bearings.
oiling.
greasing.
fitting tyres between two surfaces. etc.
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2015-10-20T15:24:10+05:30
Yup we can decrese friction by lubricating ,,,,even by reducing the matter in object ,,by changing the position of the body .there are many wayss ...even by paul bearings
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