+1 vote
in Machine Kinematics by (38.0k points)
Which of the following statements regarding laws governing the friction between dry surfaces are correct?

(a) The friction force is directly proportional to the normal force.

(b) The friction force is dependent on the materials of the contact surfaces.

(c) The friction force is independent of the area of contact.

(d) all of the mentioned

This question was addressed to me in an interview for job.

The above asked question is from Coefficient of Friction topic in section Friction of Machine Kinematics

1 Answer

0 votes
by (106k points)
Correct choice is (d) all of the mentioned

To explain I would say: Following are the laws of solid friction :

1. The force of friction is directly proportional to the normal load between the surfaces.

2. The force of friction is independent of the area of the contact surface for a given normal load.

3. The force of friction depends upon the material of which the contact surfaces are made.

4. The force of friction is independent of the velocity of sliding of one body relative to the other body.

Related questions

We welcome you to Carrieradda QnA with open heart. Our small community of enthusiastic learners are very helpful and supportive. Here on this platform you can ask questions and receive answers from other members of the community. We also monitor posted questions and answers periodically to maintain the quality and integrity of the platform. Hope you will join our beautiful community
...