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: Moment of inertia of triangle rotated about y axis

  1. Dec 18, 2011 #1

    Similar to my other thread https://www.physicsforums.com/showthread.php?t=557750

    I think in this case I need to use triple integrals

    But what is the integrand and limits?

    Can someone please help me set it up?

    Here's all I know

    Code (Text):

    Please help I have my final next wednesday.
  2. jcsd
  3. Dec 18, 2011 #2


    User Avatar
    Homework Helper

    Find the moment of inertia. What is the moment of inertia of a point mass dm at distance r from the rotation axis? The triangle consist of small masses, and you need to integrate their contribution.
  4. Dec 20, 2011 #3
    I don't know :(
  5. Dec 20, 2011 #4
    I have 6 exams this week and my physics exam is tomorrow so please just walk me through this problem. I have no time left to spend trying to figure it out.
    Last edited by a moderator: Apr 27, 2017
  6. Dec 20, 2011 #5


    User Avatar
    Homework Helper

    I can not do, sorry. The policy of the Forums does not allow it.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook