# Moment of inertia

**rotational inertiamoments of inertiainertia tensormoment of inertia tensorprincipal axesmomentmass moment of inertiaprincipal moments of inertiainertiaprincipal axis**

The moment of inertia, otherwise known as the angular mass or rotational inertia, of a rigid body is a tensor that determines the torque needed for a desired angular acceleration about a rotational axis; similar to how mass determines the force needed for a desired acceleration.wikipedia

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