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!

Stability and moment of inertia

  1. Feb 13, 2009 #1
    The problem and my work is below....I believe I got the problem to work out. The only question I had was if I found the LEAST moment of inertia which is whats needed for the formula at the end of my calculations. What exactly is meant by the least moment of inertia?

    http://i674.photobucket.com/albums/vv106/jason03_2009/prob7-1.jpg [Broken]

    http://i674.photobucket.com/albums/vv106/jason03_2009/prob7-2.jpg [Broken]
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Feb 13, 2009 #2

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    You have calculated the least (minor axis) moment of inertia by assuming the 4 feet as your 'b' and 2 feet as your 'h'. The major axis moment of inertia is much greater ( using 2 feet as the 'b' and 4 feet as the 'h'); hence, the wall is much less stable along the weak axis, and thus, the least moment of inertia applies.
     
  4. Feb 13, 2009 #3
    ok I see.... so if the rectangle was rotated than the major axis would be calculated with the base being 2 and height being 4.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Stability and moment of inertia
  1. Moment of Inertia (Replies: 1)

  2. Moment of Inertia (Replies: 1)

Loading...