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Cylindrical Shaft Moment of Inertia Equations

Strength Mechanics of Materials

The following is a list of area moments of inertia. The area moment of inertia or second moment of area has a unit of dimension length4, and should not be confused with the mass moment of inertia. If the piece is thin, however, the mass moment of inertia equals the area density times the area moment of inertia. Each is with respect to a horizontal axis through the centroid of the given shape, unless otherwise specified.

Polar Moment of Inertia

Polar Moment of Inertia

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