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  9. Q34

APSC CCE 2023 · Question 34 of 163

It is easier to roll a barrel than to pull it because

General Science

  1. Athe full weight of the barrel comes into play when it is pulled
  2. Brolling friction is much less than sliding frictionCorrect
  3. Cthe surface area of the barrel in contact with the road is more in case of pulling
  4. Dof a reason other than those mentioned

Answer: B. rolling friction is much less than sliding friction

Explanation

Rolling friction is far smaller than sliding (kinetic) friction, so rolling the barrel needs much less effort than dragging it.

Source: APSC CCE Prelims 2023 GS Paper-I, official Series-A key

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