Question

Suppose an object A is kept on another object B. The frictional force between them depends on ______.

• A. the surface irregularities of object A
• B. the surface irregularities of object B
• C. the surface irregularities of both objects A and B
• D. the weight of object B.

Answer 1

The correct option is C the surface irregularities of both objects A and B

Friction is a contact force and caused by the interlocking between the surface irregularities of both surfaces. So the friction between objects A and B depends on the irregularities of surfaces of both the objects.