1. Apr 6, 2015 #1

   END

   

   In the context of centroids and moments, what do ##\bar{x}_{\textrm{el}}## and ##\bar{y}_{\textrm{el}}## represent?
   
   For example:
   
   $$\bar{x}L = \int \bar{x}_{\textrm{el}}dL$$

    

   END, Apr 6, 2015
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3. Apr 7, 2015 #2

   mathman

   

   Science Advisor

   Gold Member

   The integral itself looks like a first moment, where the integrand is a function of position. I have no idea where this came from, so I can't go into any more detail.

    

   mathman, Apr 7, 2015
4. Apr 7, 2015 #3

   END

   

   Thanks for your response, mathman.
   
   Here are some resources that utilize this notation:
   
   

   1. (page 1) http://www.sut.ac.th/engineering/Civil/CourseOnline/430201/pdf/05_review.pdf
   2. Vector Mechanics for Engineers:Statics and Dynamics by Ferdinand P. Beer & E. Russell Johnston J.

   Below is an example problem Beer's
   
   

    

   END, Apr 7, 2015
5. Apr 7, 2015 #4

   SteamKing

   

   Staff Emeritus

   Science Advisor

   Homework Helper

   x_EL and y_EL represent the location of the centroid of a tiny element of length dL or a tiny element of area dA used to calculate the first moments of length or area.
   
   Study pp. 1 and 2 of the link carefully.

    

   SteamKing, Apr 7, 2015

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