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Question

What happens to the friction between the two surfaces when the lubricant is applied between the two surfaces?


A

Cannot be determined

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B

Increases

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C

Decreases

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D

Remains same

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Solution

The correct option is C

Decreases


The friction is caused due to the interlocking of irregularities between two surfaces. When the lubricant is applied, it forms a layer between the two surfaces. Hence, the irregularities are prevented from interlocking and friction decreases between two surfaces.


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