What is reduced by a lubricant?

Correct option is D

The correct answer is (d) The interlocking of the irregularities of the surfaces.
· A lubricant reduces friction between surfaces by minimizing the interlocking of surface irregularities. When two surfaces come into contact, their microscopic peaks and valleys (irregularities) interlock, causing resistance to motion. A lubricant forms a thin film between the surfaces, reducing direct contact and thus lowering the friction caused by this interlocking.
Information Booster:
· Lubricants: Common examples include oils and greases, which help machines operate smoothly and reduce wear and tear.
· Applications: Used in engines, gears, and machinery to prevent overheating and damage due to friction.