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Question

Why is lubricating oil put on the moving parts of a machine?


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Solution

  1. Friction is the force that opposes the motion when the surface of one object comes in contact with the surface of another object.
  2. It is an opposing force.
  3. Lubricating oil is put on the moving parts of a machine to reduce the friction force, and hence to make the rotation of the machine's moving part smooth.

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