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Find the maximum weight

  1. Oct 14, 2010 #1
    I have the solution of this problem, but I would like someone to give me some guidance on how to begin solving the problem. Thanks!

    A 1520-N crate is to be held in place on a ramp that rises at 30.0° above the horizontal (see Fig. CH 5-6.15). The massless rope attached to the crate makes a 22.0° angle above the surface of the ramp. The coefficients of friction between the crate and the surface of the ramp are µk = 0.450 and µs = 0.650. The pulley has no appreciable mass or friction. What is the maximum weight w needed to hold this crate stationary on the ramp?

    solution= 1380N
     

    Attached Files:

  2. jcsd
  3. Oct 14, 2010 #2
    draw a free body diagram of the crate. vector sum of horizontal forces as well as vertical forces will be zero. from this u can find w.
     
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