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!

Center of Mass

  1. Sep 18, 2011 #1
    1. The problem statement, all variables and given/known data

    Capture.JPG
    2. Relevant equations
    Please see attachment to #3.


    3. The attempt at a solution
    Attempt Center of Mass 001.jpg

    Apparently, the answer is Y= 4R/(3*pi). Why???
     
  2. jcsd
  3. Sep 18, 2011 #2

    kuruman

    User Avatar
    Homework Helper
    Gold Member

    You are asking the wrong question. The right question to ask is, "Where did I go wrong?" You went wrong in that you did not calculate the x and y components of the center of mass vector. You need to calculate the x and y components of that vector separately.
     
  4. Sep 18, 2011 #3
    Thanks. I separated vector r into x and y components, integrated, and I got it.

    I guess my first attempt did not work because even though I tried to do a conversion at the end...I needed to integrate r as a vector first because its components change as the angles change.
     
  5. Sep 18, 2011 #4

    kuruman

    User Avatar
    Homework Helper
    Gold Member

    You got it. It's a common mistake to do what you did. Now you know better. :smile:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Center of Mass
  1. Center of mass (Replies: 12)

Loading...