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moment of inertia

noun

Definitions

  1. A measure of a rigid body's resistance to change in its angular velocity around a given…

    A measure of a rigid body's resistance to change in its angular velocity around a given axis.

    • The moment of inertia of a rigid body is a quantity that determines the torque needed for a given angular acceleration about a given rotational axis, analogous to how mass determines the force needed for a given acceleration.
    • The moments of inertia of a heterogeneous body whose boundary is a surface of uniform density may sometimes be found by the method of differentiation.
    • Consequently, the moment of inertia of a body relative to any axis can be found when that for the parallel axis through its centre of gravity is known.

  2. Second moment of area

    Second moment of area; a measure of a rigid body's resistance to bending.

The neighborhood

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sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA