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Question

Which of the following has the greatest value of coefficient of friction?


A

Static friction

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B

Rolling friction

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C

Sliding friction

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D

Fluid friction

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Solution

The correct option is A

Static friction


Explanation for correct answer: option(A)

  1. The frictional coefficient describes as the ratio of the force of friction between two bodies and the normal force pressing them together.
  2. Coefficient of static friction μs=fsN; fs=static frictional force, N=normal reaction force
  3. Coefficient of sliding or kinetic friction μk=fkN; fk=kinetic frictional force, N=normal reaction force
  4. Coefficient of rolling friction,μr=frN ; fr=rolling frictional force, N= normal reaction force
  5. The values of µs and µk depend on the nature of both the surfaces in contact.μs>μk>μr

Hence,static friction has the greatest value of coefficient of friction.


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