What would be the impact on friction if powder is sprinkled on the ?

It increase little

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It increases to a large extent

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It doesn't change

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It decreases

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Solution

The correct option is D
It decreases

Sprinkling of powder makes the surface of the board smoother than before due to comparatively less inter-locking between irregularities of the surfaces.Thus, we can conclude that the friction has been reduced.

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