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Ramp with friction

  1. Mar 9, 2010 #1
    1. The problem statement, all variables and given/known data

    When mass M is at the position shown, it is sliding down the inclined part of a slide at a speed of 2.19 m/s. The mass stops a distance S2 = 2.5 m along the level part of the slide. The distance S1 = 1.07 m and the angle θ = 29.70°. Calculate the coefficient of kinetic friction for the mass on the surface

    http://s876.photobucket.com/albums/...&current=prob27a_MechEnWFriction.gif&newest=1


    2. Relevant equations

    E = K+U



    3. The attempt at a solution

    Don't even know where to start...
     
    Last edited: Mar 9, 2010
  2. jcsd
  3. Mar 9, 2010 #2

    ideasrule

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    Homework Helper

    You can use conservation of energy, taking into account the energy lost by friction.
     
  4. Mar 9, 2010 #3
    ok i know what you are talking about but how do i do that?
     
  5. Mar 9, 2010 #4

    ideasrule

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    Initial energy (potential+kinetic), minus the energy lost by friction, is equal to final energy (potential+kinetic). Write that out in an equation as your first step.
     
  6. Mar 9, 2010 #5
    Ok, would this be KE1+PE1-Efr=KE2+PE2?
     
  7. Mar 9, 2010 #6
    Thanks i already figured it out.
     
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