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: Hoop kinetic energy

  1. Dec 7, 2013 #1
    Hey PF, this is just a quick question:

    If there's a hoop of mass M and radius a rotating around its vertical axis (see pic) and I want to write the kinetic energy for the Lagrangian is it just [itex] T = \frac{1}{2} M a^2 w^2 [/itex] ? Considering w the angular velocity

    Attached Files:

  2. jcsd
  3. Dec 7, 2013 #2
    Not quite. What is the moment of inertia for this set up?
  4. Dec 7, 2013 #3
    [itex] T =\frac{1}{2} w^2 \frac{1}{2} M a^2 [/itex] ? is it more close to the answer now?
  5. Dec 7, 2013 #4
    Yeah it's right now
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted