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Frictional Force

Friction does...

Question

Friction does not depend on ______.

A

smoothness of a surface

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B

roughness of a surface

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C

weight of an object

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D

area of contact of a surface

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Solution

The correct option is D area of contact of a surface
Frictional force depends on roughness of the surface and weight of an object in contact with the surface. Friction is independent of area of contact between the two surface as the roughness is constant.

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