Multiple choice

How can friction be reduced to zero?

  1. By using oil

  2. By using polishing

  3. By using grease

  4. Never possible
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Friction can never be reduced to zero. Even with lubricants, polishing, or other friction-reducing methods, there's always some microscopic resistance between surfaces in contact. Complete elimination of friction is physically impossible.

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