What happens to the interlockings between two surfaces when a lubricant is applied between them?

No change

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Interlocking increases

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Interlocking decreases

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Cannot be determined

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Solution

The correct option is C Interlocking decreases
Friction is caused due to the interlocking of irregularities between two surfaces. When the lubricant is applied, it reduces friction between the surfaces by forming a layer between them and separates the solids from direct contact. Hence, the interlocking of irregularities gets reduced.

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