Do Friction Forces Have Units?

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    Friction Units
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Homework Help Overview

The discussion revolves around the concept of friction and its units, specifically questioning whether friction itself has units and how it relates to the coefficient of friction.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the nature of friction and its units, with some clarifying that the coefficient of friction is dimensionless. Questions arise about what is meant by "friction itself" and the units associated with the force of friction.

Discussion Status

The discussion is progressing with participants confirming that the force of friction has units, specifically Newtons, while clarifying the distinction between the coefficient of friction and the force itself.

Contextual Notes

There is a focus on understanding the definitions and relationships between different concepts related to friction, with some participants questioning assumptions about what is meant by "friction." The context of homework constraints is implied but not explicitly stated.

AirHendrix
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Homework Statement


Does Friction have units?


Homework Equations



U = Ff / Fn



The Attempt at a Solution



I know the coefficient which is "Mew" U, has no units whatsoever but I just wanted to know if friction itself had units.
 
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U is the coefficient of friction.It is the ratio of two dimensionally similar quantities, just like refractive index. So it has no units.
 
Last edited:
AirHendrix said:
I know the coefficient which is "Mew" U, has no units whatsoever but I just wanted to know if friction itself had units.
What do you mean by "friction itself"? The force of friction certainly has units, just like any other force.
 
^ What units would the force of friction have?
 
AirHendrix said:
^ What units would the force of friction have?
The same units as any other force.
 
Doc Al said:
The same units as any other force.

So Newtons then?
 
AirHendrix said:
So Newtons then?
Exactly.
 

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