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: Moment of inertia

  1. Dec 4, 2007 #1
    1. The problem statement, all variables and given/known data
    Find the moment of inertia around the z-axis of the solid bounded by x=0, y=0,z=0,y=1-x^2 and 4x+3y+2z+12 assume density=1.

    2. Relevant equations
    please refer to my attachment.

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Dec 5, 2007 #2

    Shooting Star

    User Avatar
    Homework Helper

    You have written 4x+3y+2z+12, which I'm interpreting as 4x+3y+2z=12 => x/3+y/4+z/6=1. (All right, now I got the correct eqn from the pdf file.)

    How can x go from 0 to 3? In the 1st octant, x is from 0 to 1. The rest looks OK.
  4. Dec 5, 2007 #3
    Yes your assumption above was correct, and thank you for your assistance!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook