Multiple choice

Which of the following is not a negative effect of friction?

  1. Worn out soles in an old shoe.

  2. A child is able to write with a pencil.

  3. Ball bearing in a machine wearing out.

  4. Wearing out of tyres of vehicles.

  5. Machine working for a long time producing too much heat.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Writing with a pencil or pen will not be possible without friction.

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