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: Kinetic Energy

  1. Nov 4, 2005 #1
    Hi, i'm having difficulty figuring out the radius for this problem, I need the radius in order to figure out the kinetic energy:

    A wheel has a thin 2.8 kg rim and four spokes each of mass 1.4 kg. Find the kinetic energy of the wheel when it rolls at 6 m/s on a horizontal surface.

    I know that the I = 4(1/3 MR^2) + MR^2 and K = 1/2Mv^2 + 1/2Iw^2.

    Anybody know how to figure out the radius, THANK YOU?
     
  2. jcsd
  3. Nov 4, 2005 #2
    Please try working out the answer, leaving R as a variable. What do you get?

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