Answer
$y_{cog} = 1.97~m$
Work Step by Step
We can find $y_{cog}$:
$y_{cog} = \frac{\sum g_i~y_i}{\sum g_i}$
$y_{cog} = \frac{(7.80)(2.00~m)+(7.60)(2.00~m)+(7.60)(4.00~m)+(7.40)(4.00~m)}{8.00+7.80+7.60+7.40+7.60+7.80}$
$y_{cog} = 1.97~m$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 12 - Equilibrium and Elasticity - Problems - Page 345: 1d
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