Question

Which one of the following does not affect the force of friction acting on two objects?

• A. Nature of their surfaces in contact
• B. Mass of the objects in contact
• C. Area of contact of the surfaces.

Answer 1

The correct option is B

Mass of the objects in contact

Explanation for correct option:

Option (B):

The force of friction remains unaffected if the mass of objects in contact is more or less.

Explanation for incorrect option:

Option (A):

Force of friction is more for rough surfaces as compared to smooth surfaces.

Option (C):

More is the area of contact, more will be the force of friction.

Hence, the correct option is option (B).