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Question

Least amount of friction is required in which of the following sports?


  1. Rubbing of hands

  2. Rubbing of glass

  3. Rubbing of sand paper

  4. Rubbing of woollen clothes


Solution

The correct option is C

Rubbing of sand paper


Except for ice skating, in all the other sports friction required is more. For slowing down of vehicles or football or to hold the rope in a tug of war, more friction is required. But in ice skating, the friction should be low to allow easy sliding of the skates.

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