# What are the dimensions of coefficient of friction?

Category: QuestionsWhat are the dimensions of coefficient of friction?
Editor">Editor Staff asked 1 year ago

What are the dimensions of coefficient of friction?

(a) MLT^-2

(b) LT^-1

(c) L

(d) It is dimensionless

I got this question in exam.

Question is from Dimensional Formulae and Equations topic in chapter Units and Measurements of Physics – Class 11
Select the correct answer from above options
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Editor">Editor Staff answered 1 year ago

The correct answer is (d) It is dimensionless

Easiest explanation: Coefficient of friction is the ratio of Frictional force to Normal Reaction force; hence it is dimensionless. The formula for calculating this is, f = µN.

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