# What is a reasonable coefficient of friction?

## What is a reasonable coefficient of friction?

Most dry materials in combination have friction coefficient values between 0.3 and 0.6. Values outside this range are rarer, but teflon, for example, can have a coefficient as low as 0.04.

How do you find the practical coefficient of friction?

The coefficient of friction (fr) is a number that is the ratio of the resistive force of friction (Fr) divided by the normal or perpendicular force (N) pushing the objects together. It is represented by the equation: fr = Fr/N.

### How do you find the maximum coefficient of friction?

On a flat surface, the normal force on an object is η = mg. The coefficient of static friction can be found by rearranging the formula for the maximum force of static friction: μs = 0.6020… We find the coefficient of static friction between the brick and wood to be 0.602.

Why is coefficient of friction less than 1?

A value of 1 means the frictional force is equal to the normal force. It is a misconception that the coefficient of friction is limited to values between zero and one. A coefficient of friction that is more than one just means that the frictional force is stronger than the normal force.

## Can the coefficient of friction be greater than 1?

A coefficient of friction that is more than one just means that friction is stronger than the normal force. An object such as silicon rubber for example, can have a coefficient of friction much greater than one. This can be explained as below: Hence, the coefficient of friction becomes greater than one.

Can you find coefficient of friction without mass?

The frictional force in this case depends on the two types of materials interacting (described by the coefficient μk) and how hard these two surfaces are pushed together (the normal force). Also, the coefficient of friction doesn’t depend on the mass of the object.

### Can coefficient of friction be less than 1?

The coefficient of friction is dimensionless and it does not have any unit. It is a scalar, meaning the direction of the force does not affect the physical quantity. The coefficient of friction depends on the objects that are causing friction. The value is usually between 0 and 1 but can be greater than 1.

Is MU always less than 1?

Occasionally it is maintained that µ is always < 1, but this is not true. While in most relevant applications µ < 1, in more layman’s parlay a value above 1 means the force required to slide an object along the surface is greater than the normal force of the surface on the object.