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Homework Help: Incline Plane Help Please!

  1. Feb 6, 2012 #1
    1. The problem statement, all variables and given/known data
    A box slides down a 31 degree ramp with an acceleration of 1.42 m/s squared. determine the coefficient of kinetic friction (mew) between the box and the ramp.


    2. Relevant equations
    F=ma Fnet=ma Fn(µ)=Ff


    3. The attempt at a solution
    Many attempts on paper but unable to show on this.
     
  2. jcsd
  3. Feb 6, 2012 #2

    PhanthomJay

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    Please show one of your attempts so we may better assist. You need to draw a FBD of the box identifying the weight, normal, and friction forces acting on it,,,,,,,look up 'inclined planes'....and for simplicity choose the x axis as parallel to the plane and the y axis as perpendicular to the plane..and Apply Newton's laws in the x and y directions.
     
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