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Question

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


  1. No change

  2. Interlocking decreases 
  3. Cannot be determined
  4. Interlocking increases


Solution

The correct option is B 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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