Multiple choice

Which of the following processes is not done to increase the friction?

  1. Treading of tyres

  2. Growing of sole of shoes

  3. Throwing sand on tracks

  4. Oiling
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Treading tyres, growing shoe soles, and throwing sand on icy tracks all create rougher surfaces that INCREASE friction for better grip. Oiling creates a lubricating layer that DECREASES friction between surfaces, making them slide more easily.

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