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Factors Affecting Friction

Friction can ...

Question

Friction can be increased by
(a) using ball bearings between the two surfaces.
(b) making the surfaces rough.
(c) lubricating the surfaces.
(d) using streamlined shapes.

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Solution

Friction can be increased by making the surfaces rough. The rougher a surface, greater the friction.

Hence, the correct answer is option B.

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