1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Static equilibrium

  1. May 13, 2009 #1
    1. The problem statement, all variables and given/known data

    A 15.5 m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes a 56.0° angle with the horizontal.

    (a) Find the horizontal and vertical forces the ground exerts on the base of the ladder when an 810 N firefighter is 4.10 m from the bottom.

    Magnitude of the horizontal force


    Magnitude of the vertical force


    (b) If the ladder is just on the verge of slipping when the firefighter is 9.20 m up, what is the coefficient of static friction between ladder and ground?

    2. Relevant equations

    I have no idea how to do this /:
    All I know is that the sum of the forces in the x and y direction has to equal 0.
    Other than that...

    3. The attempt at a solution
     
  2. jcsd
  3. May 14, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Good--that describes translational equilibrium. What's the condition for rotational equilibrium?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Static equilibrium
  1. Static Equilibrium (Replies: 5)

  2. Static Equilibrium (Replies: 4)

  3. Static equilibrium (Replies: 2)

  4. Static Equilibrium (Replies: 5)

Loading...