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!

Axes passing thru centroid

  1. Nov 23, 2015 #1
    1. The problem statement, all variables and given/known data
    determine the second moment of inertia about the horizontal axis and vertical axis for the shaded area with respect to x and y axes through the centroid of the area .

    2. Relevant equations

    3. The attempt at a solution
    Since the x and y axes is drawn thru centroid , why not the y for part 1 = 0mm ? y for part 2 = -30mm?

    Attached Files:

    • 4.png
      File size:
      171.7 KB
  2. jcsd
  3. Nov 23, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Because the axes being used for the calculation are not the same ones shown in Fig. 6.7. The calculation axes are shown at the lower right-hand part of the page, just above the table.

    You must read the text in order to follow what is going on; you can look at one picture and assume it applies regardless.
  4. Nov 24, 2015 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    You meant 'cannot', right?
  5. Nov 24, 2015 #4


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Axes passing thru centroid
  1. Passing by (Replies: 1)

  2. Finding Centroids (Replies: 20)

  3. Centroid of an area (Replies: 11)