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Need help find μ (Coefficient of Friction)!

  1. Sep 15, 2008 #1
    Im designing a lab, in which i need to find the kinetic μ for a specific surface by sliding 6 different masses from the top, and taking the time it takes to reach the bottom. This surface is 30 degrees from the floor, making it a ramp. I will know the distance the masses cover.


    Some relevant equations are -
    F=ma
    Ff=Nμ
    Fr=F-Ff
    d=vi(t)+(at^2)/2
    v=d/t

    What i did was to, drop the 6 masses from the top and take the time it takes to get to the bottom. From there u can find the v and acceleration. According to me, with acceleration you can find the Force of friction since you know the normal....I'm not sure if this is correct. If wrong, what do i need to find the μ of a surface in an experiment.
    Thanks
     
  2. jcsd
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