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Q. Friction can be reduced by which of the following?
  1. Polishing surfaces
  2. Use of lubricants
  3. Decreasing area of contact
Select the correct option from the codes given below:
Answer: Only 1 & 2
Notes: Friction between two surfaces can be reduced by polishing them. The interlocking and projections are minimized by this method. Friction can also be reduced by applying lubricants between the contact surfaces to fill the fine pores or depressions in the surfaces and make them smooth. Friction does not depend on the area of contact.

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📌 Question Number: 49 in Physics GK 04 - Motion & Friction in the above course in App.