USA: +1-585-535-1023

UK: +44-208-133-5697

AUS: +61-280-07-5697

Centroids of Areas

Fig. 6.5 shows an area of constant thickness t. So the elemental mass dm is given by

dm = pt dA                  p, t are constants, dA =elemental area.

From equation (6.2), we have

x = ʃ x dA / A , y = ʃ y dA / A , z = ʃ z dA / A

In equation (6.6), ʃ x dA, ʃ y dA, ʃ z dA are known as first moment of area.