Question

a)friction depends only on surface area of an object not its mass ​

Answer 1

Answer:

Also, the coefficient offriction doesn't dependon the mass of the object. ... That means that the component ofthe gravitational force perpendicular tothe plane must be equal to themagnitude of the normal force and thecomponent parallel to the plane must be equal to the frictional force.

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Answer 2

Answer:

Friction does not depend on the amount of surface area in contact between the moving bodies or (within certain limits) on the relative speed of the bodies. It does, however, depend on the magnitude of the forces holding the bodies together.