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Cause of Friction

Friction does...

Question

Friction does not depend on the following factor
A)The nature of the surface. B)The normal reaction
C)Roughness of the surface. D)The area of contact

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Solution

Hello Sri Charan,
You perhaps are acquainted with the formula for frictional force.

F=kNwhere k is the coefficient of friction and N is the normal force from the surface. Both of these do not depend on the area of contact.
So Opt D is the answer
Whereas K depends on nature of surface and its type

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