Multiple choice

In cases where friction is useful, one wants to increase it. Which of the following is not a method to increase friction?

  1. By making treads in the tyres of vehicles

  2. By providing spikes in the shoes of players

  3. By making soles of shoes smooth

  4. By using some coarse substance on the hands of a gymnast

  5. By using sledges instead of trolleys with wheels
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this is not a method to increase friction. 

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