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!

Moment of inertia help

  1. Feb 1, 2012 #1
    what is a moment of inertia? I know it's used for angular mechanics (like angular velocity and stuff like that), but what is a moment of inertia? A good definition with some examples would help tremendously. Thank you much in advance :)
     
  2. jcsd
  3. Feb 1, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi michael! :smile:

    just as the mass (or inertia) of a body is the ratio between any force on it and its (linear) acceleration,

    so the moment of inertia of a body is the ratio between the moment of force (also called the torque) on it and its angular acceleration

    in other words: mass (or inertia) tells you how difficult it is to push, while moment of inertia tells you how difficult it is to turn :wink:

    (for examples, see the pf library or wikipedia)
     
    Last edited: Feb 1, 2012
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Moment of inertia help
  1. Moment of inertia help (Replies: 1)

  2. Moment of inertia (Replies: 70)

Loading...