Planar lamina
From Wikipedia, the free encyclopedia
In mathematics, a planar lamina is a closed surface of mass <math>M</math> and surface density <math>\sigma\ (x,y)</math> such that:
- <math>M = \int\int_{}{}\sigma\ (x,y)\,dx\,dy</math>, over the closed surface.
Planar laminas can be used to determine moments of inertia, or center of mass.
