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: Finding the moment of intertia

  1. Feb 16, 2010 #1
    1. The problem statement, all variables and given/known data
    A solid sphere of mass 2 kg and 5 m radius is in space. Find its moment of inertia.

    2. Relevant equations2
    moment of inertia of a solid sphere about its diameter: [tex]\frac{2}{5}[/tex]MR2, where M is the mass of the sphere and R is its radius.

    3. The attempt at a solution
    I = mr^2 = (2 kg)(25 m^2) = 50 kgm^2

    Is that right, or am I totally out to lunch? Seems too easy.
    Last edited: Feb 17, 2010
  2. jcsd
  3. Feb 16, 2010 #2


    User Avatar
    Homework Helper

    Yes that looks correct to me.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook