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Force P

  1. Feb 20, 2008 #1
    A crate of weight Fg is pushed by a force on a horizontal floor.
    (a) If the coefficient of static friction is µs, and is directed at angle below the horizontal, show that the minimum value of P that will move the crate is given by the following equation.

    P=[UsFgsec(theta)]/[1-Ustan(theta)]

    (b) Find the minimum value of P that can produce motion when µs = 0.335 and Fg = 145 N for the following angles.


    I dont understand what do they want me to do in the beginning!!
     
  2. jcsd
  3. Feb 20, 2008 #2
    nvm i got it
     
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