Question

on which of the following factors the force of friction do not depend? a) type of material in contact. b) normal force. c) nature of the surface in contact. d) area of the surfaces in contact​

Answer 1

Answer:

The force of friction do not depend on the area of the surfaces in contact i.e.option(d).

Explanation:

The force of friction depends on the following factors:-

• The materials of the body which are in contact.
• The force of friction is calculated as,

                        $f=\mu N$      (1)

     Where,

     f=force of friction

    μ=coefficient of friction

    N=normal force acting on the body

    So, friction depends on the normal force acting on the body.

• Nature of the surfaces in contact. For example-rough, smooth.

But it is independent of the area of the surfaces in contact.

Hence, the correct answer among the given option is (d) the area of the surfaces in contact​.