A) Threading tires
B) Grinding on stones
C) Making spikes on shoes
D) Powdering a carom board
Correct Answer: D
Solution :
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.You need to login to perform this action.
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