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Coefficient of sliding friction without an Fa

  1. Oct 22, 2006 #1
    Problem: A 65kg create is to be accelerated at 7 m/s/s up an incline making an angle of 25 degrees with the horizontal. If the coefficient of sliding friction is .2, what force is needed to accomplish this motion?

    Well ive tried manipulating this equation to give me either a Ff or an Fn for the mu=Ff/Fn equation. Problem is where its on an incline, i need Facos25 and Fasin25, but i dont have an Fa, all im given is a 7m/s/s. Im a bit stuck and need some help here
    Thanks in advance
     
  2. jcsd
  3. Oct 22, 2006 #2
    this is a tough one, anybody?
     
  4. Oct 22, 2006 #3
    draw a FBD and then break it down into all the forces acting on it
     
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