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!

Difference between Rotation Inertia of Rod V.S Cylinder

  1. Dec 6, 2015 #1
    A rod and Cylinder with a same axis of rotation relative to its body have different rotational inertia equation. WHY?

    Thanks in advanced.
  2. jcsd
  3. Dec 6, 2015 #2
    The rod is assumed to have negligible radius. It is assumed to be a straight line having a fixed mass. In case of a cylinder, it has a radius hence its moment of inertia is different from that of a rod.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook