Law of friction depends on factor - Theory of Machines - 1

Q.  On which factors does law of friction depend?
- Published on 06 Aug 15

a. Nature of material
b. Area of contact between surfaces
c. Velocity of sliding
d. All of the above

ANSWER: Nature of material


  • Sravanthi   -Posted on 19 Oct 15

    - Opposing force acting in the direction opposite to the motion of block when it slides on a surface is called as force of friction.

    The different laws of friction are:

    1) Force of friction is directly proportional to normal reaction between surfaces in contact.

    2) Force of friction depends on the nature of material

    3) Force of friction is independent on :
    a) Area of contact
    b) Sliding velocity of one surface with respect to the other.

    - Different types of friction are as follows:

    1) Dry friction – Friction between dry or unlubricated surfaces

    2) Boundary friction – Friction between rubbing surfaces with thin layer of lubricant between them.

    3) Film friction – Friction between two rubbing surfaces with thick lubricant between them

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