PRACTICE / Perpendicular-axis theorem

Add moments about intersecting axes

A thin uniform circular disk has moment of inertia 0.12 kg·m² about each of two perpendicular diameters through its center.

Find its moment of inertia about the normal axis through the center.

1. A$0.24\ \mathrm{kg\,m^2}$
2. B$0.12\ \mathrm{kg\,m^2}$
3. C$0.06\ \mathrm{kg\,m^2}$
4. D$0.48\ \mathrm{kg\,m^2}$

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