Recent content by txpc

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    Deriving centroid of quarter circle.

    Homework Statement Find the centroid of the region cut from the first quadrant by the circle x^2+y^2=a^2Homework Equations I know that y' = (I y dA)/(I dA)The Attempt at a Solution Taking a strip dy with length x, I obtain dA = dy.x dy(a^2-y^2)^(1/2) So I y DA = I y*(a^2-y^2)^(1/2) dy from...