Perpendicular axis theorem (planar lamina) (Iz = Ix + Iy (z ⊥ plane of lamina))
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Iz = Ix + Iy (z ⊥ plane of lamina)
What each symbol means
| Symbol | What it stands for |
|---|---|
| I_z | MOI about axis perpendicular to plane |
| I_x, I_y | MOI about two perpendicular in-plane axes through same point |
When to use this
Thin plate in xy plane; z through intersection of x,y in plane.