Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Rotational Motion Force Question

  1. Mar 4, 2008 #1
    hello all, I'm studying from my midterm and having some trouble figuring out the question below..thanks for the help

    A uniform ladder of length L and mass m1 rests against a frictionless wall. the ladder makes an angle "theta" with the horizontal.

    a) find horizontal and vertical forces the ground exerts on the base of the ladder when a firefighter of mass m2 is a distance x from the bottom.

    b) if the ladder is just on the verge of slipping when the firefighter is a distance d from the bottom, what is the coefficient of static friction between ladder and ground?
  2. jcsd
  3. Mar 5, 2008 #2
    where are you stuck at? You should draw a free body diagram first.
  4. Mar 5, 2008 #3


    User Avatar
    Science Advisor

    Perhaps your problem is thinking that this has anything to do with rotational motion! As Oerg suggested, draw a "free body diagram" and then calculate the horizontal and vertical components of force at the top and bottom of the ladder.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook