Which of the following actions does not increase friction? * Treading tires, Grinding on stones, Making spikes on shoes, Powdering a carom board.
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Answer:
The friction of a surface is increased by increasing its roughness. The roughness of a carom board does not increase when it is powdered. Hence, the friction of a carom board surface does not increase when it is powdered. The correct answer is d
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4
Answer:
Powdering a carom board
Because it decreases the friction and makes the surface smooth
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