Multiple choice

Which of the following is not a method to increase friction?

  1. By making grooves on the surface

  2. By using ball bearings

  3. By making treads on the tyres

  4. By providing spikes in shoes

  5. By using some kind of coarse substance like chalk powder to increase grip in sports
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Using ball bearings will reduce the friction between moving parts, and not increase it.

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