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Question

When the lubricant is applied between the two surfaces, friction between the two surfaces .

A
increases
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B
decreases
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C
remains same
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Solution

The correct option is B decreases
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.

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