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Homework Help: Incline plane and friction

  1. Oct 23, 2012 #1
    A 2.00 kg block is held in equilibrium on an incline of angle θ = 55° by a horizontal force, F. If the coefficient of static friction between block and incline is µ s = 0.300, determine
    (a) the minimum value of F and
    (b) the normal force of the incline on the block.

    F = ma
    Mu = Ff/Fn

    I am having trouble starting out. I dont know what the initial equation should be. Could i get some hints?
  2. jcsd
  3. Oct 23, 2012 #2
    Always, always, always start with a free-body diagram. Have you done that yet?
  4. Oct 23, 2012 #3
    I have done that.
    And i changed gravity into the x and y components.
    I am not sure what to solve for first/how to solve for it
  5. Oct 23, 2012 #4
    The object is in equilibrium, so the net force in the x direction equals zero and the net force in the y direction equals 0. Now solve for that force F in the x and y direction to find its components.
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