Question

What happens to interlocking between two surfaces in contact when a lubricant is applied between them?

• A. Interlocking remains unchanged.
• B. Interlocking increases.
• C. Interlocking decreases.
• D. Interlocking no longer exists.

Answer 1

The correct option is C Interlocking decreases.

Friction is caused due to interlocking of irregularities present on the surfaces in contact. When a lubricant is applied, it forms a layer between the two surfaces. This helps in reducing interlocking and hence friction. However, friction can not be totally eliminated.