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Advantages and Disadvantages of Friction

Polishing a s...

Question

Polishing a surface in contact _______.

A

may increase or decrease friction

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B

does not affect the amount of friction

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C

increases friction

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D

reduces friction

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Solution

The correct option is D reduces friction
Polishing a surface will always reduce friction between the surfaces in contact.

Polishing reduces friction by making a surface smooth ultimately reducing the interlocking of irregularities between the surfaces.

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