Question

which of the following is not the method of decreasing friction?
1) lubrication
2) polishing
3) applying grease
4) increasing roughness​

Answer 1

4)Increasing roughness

Answer 2

Answer:

4) increasing roughness

Explanation:

when roughness increases the microscopic irregularities present also increases causing the interlocking if irregularities to be more firm , increasing friction.

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