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Homework Help: Ladder problem

  1. Dec 12, 2005 #1
    hey ive been trying this problem and any way i try i always seem to not have enough info i think im missing a keyconcept to help get more info outa the problem, well ne way here is the question

    Q: A uniform ladder rests against a frictionless vertical wall. the coefficient of static friction = 0.3. what isthe smallest angle at which the ladder will remain stationary?

    alli have comeup with is that fs / Fn = .3 and that summation Fx = 0 = fs -F1 ;fs = F1 and Fn-w = 0 so Fn = weight

    im not really sure how any of this relates to the other stuff, hopefully some one can help me out on this.

    thanx in advance.
  2. jcsd
  3. Dec 12, 2005 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Don't forget that the torques about any point must also sum to zero.
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