Multiple choice

Make an inclined plane on a smooth floor. Now put a mark with pen at any point A on the inclined plane. Let the pencil cell moves down from this point and note down distance. Now spread a piece of woollen cloth on the floor and repeat the experiment and note down distance. Now repeat this activity by spreading sand paper over it. In which of the following cases does pencil cell cover maximum distance?

  1. In all cases, distance covered would be same.

  2. When woollen cloth is spread over the floor.

  3. When sand paper is spread on the floor.

  4. When nothing is spread on the floor.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 When nothing is spread on the floor the force of friction of minimum.

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