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!

Rotational Inertias of Different Shapes

  1. Dec 7, 2013 #1
    Sorry, this isn't a question from a book or something, but I wasn't sure where else to put this. Is there a convenient way of memorizing or deriving the following?:


    I have an exam in a week and I thought I might as well try asking before making flashcards.
  2. jcsd
  3. Dec 7, 2013 #2
    Well, you can see, how the inertia is defined by an integral here:

    So basically, it's just about putting up the correct integral and solve it. I did not, however, ever need to actually derive one of them through any of my physics studies. If your teacher hasn't done it, I doubt you will be asked to. If you cannot use books or anything for the exam, I would believe, that an equation for the inertia needed for the specific body will surely be given.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Rotational Inertias of Different Shapes
  1. Rotational Inertia (Replies: 1)

  2. Rotational inertia (Replies: 2)