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!

Moment of inertia

  1. Apr 5, 2004 #1
    I need help finding the moment of inertia for a hollow cylinder with a closed bottom (like a glass of water). My strategy is to add the moments of inertia of the cylinder and the disk but I only have the total mass of the whole object. Is there a way to find the mass of each part or is there another approach to this problem?
  2. jcsd
  3. Apr 5, 2004 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Just sum the mass as an integral as follows.

    [tex]I=\int r^2 dm [/tex]
  4. Apr 6, 2004 #3

    Doc Al

    User Avatar

    Staff: Mentor

    If the thickness is uniform then you can find the masses of the cylinder and bottom by comparing their relative areas. The surface area of the cylinder is Lx2πr; the area of the bottom is πr2.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Moment of inertia
  1. Moment of Inertia? (Replies: 9)