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Homework Help: Dynamics Slide

  1. Feb 22, 2009 #1
    1. The problem statement, all variables and given/known data
    A slide-loving pig slides down a certain 35 degree slide in twice the time it would take to slide down a frictionless 35 degree slide. What is the coefficient of kinetic friction between the pig and the slide?


    2. Relevant equations
    fs = Mk * Fn


    3. The attempt at a solution
    I'm not quite sure how to tackle this one =(
     
  2. jcsd
  3. Feb 22, 2009 #2

    Hootenanny

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    HINT: Find the component of the net force that acts parallel to the incline.
     
  4. Feb 22, 2009 #3

    LowlyPion

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    Perhaps examine the kinematic relationship between time distance and acceleration?

    x = 1/2*a*t2
     
  5. Feb 22, 2009 #4
    I dont understand how to do it, I'm only given the 35 degree angle. Also the answer isn't given in the back of the book so I couldn't know if I did it right even if I did have te correct procedure.
     
  6. Feb 22, 2009 #5

    Hootenanny

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    Okay. I suggest you start by drawing a free body diagram, labelling all the forces.
     
  7. Feb 22, 2009 #6
    I have tried this... I still don't know what to do. Can you please show me the solution?
     
  8. Feb 22, 2009 #7
    I got 0.53 as my Mk.. please let me know if this is right.
     
  9. Feb 22, 2009 #8

    LowlyPion

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    That's what I get.

    3/4*tan35
     
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