1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Static equilibrium

  1. Sep 25, 2008 #1
    A window cleaner of mass 95 Kg places a 22 KG ladder against a frictionless wall, at an angle 65 degrees with the horizontal. The ladder is 10 m long and rests on a wet floor with a coefficient of static friction equal to 0.40 What is the maximum length that the window cleaner can climb before the ladder slips.

    I know I need to use Torque, in both X and Y directions, but how do I find the length that the painter can climb.

  2. jcsd
  3. Sep 26, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi brookbj! :smile:

    (torque doesn't come in x and y directions … it's just a number … or, in 3D, it's a vector in the z direction :wink:)

    Hint: take moments (torques) about the top of the ladder. :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook