Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Grade 12 Physics, Coefficient of Friction

  1. Oct 14, 2012 #1
    1. The problem statement, all variables and given/known data
    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

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


    3. The attempt at a solution
    We had to draw a free body diagram so I"ll upload it
     

    Attached Files:

    Last edited: Oct 14, 2012
  2. jcsd
  3. Oct 14, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Good morning JamesNam! Welcome to PF! :smile:
    I'm confused … what exactly is the question? :confused:

    (and what's your answer?)
     
  4. Oct 14, 2012 #3
    Thanks for the welcome! And we have to derive an equation for μk from the free body diagram that I have attatched.
     
  5. Oct 15, 2012 #4

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    is it stationary or moving? :confused:

    anyway, show us what you've tried :smile:
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook