Multiple choice

It is difficult to write on polished surface with pencil because

  1. Friction prevents the movement of pencil

  2. Polished surfaces have no friction

  3. Polished surfaces have less friction

  4. Polished surfaces have high friction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Polished surfaces have less friction due to which the graphite of pencil does not gets detached from the pencil and stick to the board and hence cannot write.

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