1. Not finding help here? Sign up for a free 30min 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 on Moments of inertia of system

  1. Nov 6, 2009 #1
    1. The problem statement, all variables and given/known data

    Four masses are held in position at the corners of a rectangle by light rods.Find the moment of inertia of the system about the x axis.Find the moment of inertia of the system about the y axis.Find the moment of inertia of the system about an axis through O and perpendicular to the page. M1 (kg) M2 (kg) M3 (kg) M4 (kg) the picture is attached.
    2.70 1.70 3.70 2.10

    2. Relevant equations

    I=mR2

    3. The attempt at a solution
    I wasn't really sure how to start. Should I first figure out the center of mass and then use that value to find the inertia?
     

    Attached Files:

  2. jcsd
  3. Nov 6, 2009 #2

    kuruman

    User Avatar
    Homework Helper
    Gold Member

    The center of mass has nothing to do with this. Just multiply each mass by the square of its distance from the appropriate axis and add all the terms together.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Homework help on Moments of inertia of system
  1. Moment of inertia help. (Replies: 28)

Loading...