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: Rotational Equilibrium

  1. Nov 18, 2007 #1
    1. The problem statement, all variables and given/known data

    Here is the problem and a diagram:

    http://www.city-wars.com/lastscan.jpg [Broken]

    2. Relevant equations

    T= r*F

    3. The attempt at a solution

    I don't know where to begin. Where are the normal forces acting? I am just can't visualize this problem and it has me stumped.
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Nov 18, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    A normal force acts normal (perpendicular) to the moment arm on which it acts. The moment arms extend from the pivot to the point of interaction.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook