Grade 12 Physics, Coefficient of Friction

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Homework Help Overview

The discussion revolves around deriving an equation for the coefficient of kinetic friction in a physics context. Participants are exploring the relationships between forces involved, particularly in relation to free body diagrams.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to clarify the requirements of the problem, questioning whether specific values are necessary for the derivation. There is also uncertainty about the setup, including whether the object in question is stationary or moving.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the original question and sharing their attempts to visualize the problem through free body diagrams. Some guidance has been offered regarding the need to show work done so far.

Contextual Notes

There is mention of missing information, such as the mass of the object, which may affect the derivation process. Participants are also questioning the definitions and assumptions related to the forces involved.

JamesNam
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Homework Statement


Derivation of an equation for the coefficient of kinetic friction
*Since it's just a derivation, values won't be required, right?
*No mass was given

Homework Equations


Ff = μFN
FN = FgCosθ
Fnet= Fapp - Ff - FgSinθ <- Not sure about this.


The Attempt at a Solution


We had to draw a free body diagram so I"ll upload it
 

Attachments

  • physics.jpg
    physics.jpg
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Last edited:
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Welcome to PF!

Good morning JamesNam! Welcome to PF! :smile:
JamesNam said:

Homework Statement


Derivation of an equation for the coefficient of kinetic friction
*Since it's just a derivation, values won't be required, right?
*No mass was given

Homework Equations


Ff = μFN
FN = FgCosθ


The Attempt at a Solution


We had to draw a free body diagram so I"ll upload it

I'm confused … what exactly is the question? :confused:

(and what's your answer?)
 
Thanks for the welcome! And we have to derive an equation for μk from the free body diagram that I have attatched.
 
is it stationary or moving? :confused:

anyway, show us what you've tried :smile:
 

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