Statics Practice Problem 9-11: Centroid of an area defind by a curve

[@shapari23]

In what cases would x tilda = x and y tilda = y? In this problem, I am confused why we put x tilda = x

[@engineeringvision]

X tilda and y tilda are simply the centroid of our differential element, for this example the centroid of our differential element are x and y/2. For vertical differential element, x tilda will be x

[@garrettshelton5788]

reminds me of that tragedy

[@engineeringvision]

What tragedy? Did you fail statics?