Calculating Center of Mass: Xi & Yi for Statics

AI Thread Summary
The discussion focuses on calculating the center of mass coordinates, Xi and Yi, in a statics context. The original poster seeks clarification on how to fill in these values based on a provided table. It is clarified that the calculations for Xi involve considering the entire dimensions rather than just individual sections, leading to a cumulative approach. For example, Xi values are calculated by adding half the width of each section to the previous total. Understanding this method is crucial for accurately determining the center of mass in statics problems.
Yarnzorrr
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Ive been given this table in a lecture (attached) and I'm not sure what they're using to fill in the columns of Xi an Yi, it looks like it should just be half of each section in Yi, but that is not the case in Xi, can anyone please explain this to me.

Thanks =)
 

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    Screen Shot 2012-10-17 at 2.12.39 PM.png
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Oh its okay I understand, you have to include the entire thing and not just the individual sections.

ie.
xi (1) = 40/2 = 20
xi (2) = 300/2 + 40 = 190
xi (3) = 20/2 + 300 + 40 = 350
 

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