# moment of inertia

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Related to Principal moment of inertia: Product of inertia, Rotational inertia

## moment of inertia

n. pl. moments of inertia
A measure of a body's resistance to angular acceleration, equal to:
a. The product of the mass of a particle and the square of its distance from an axis of rotation.
b. The sum of the products of each mass element of a body multiplied by the square of its distance from an axis.
c. The sum of the products of each element of an area multiplied by the square of its distance from a coplanar axis.

## moment of inertia

n
(General Physics) the tendency of a body to resist angular acceleration, expressed as the sum of the products of the mass of each particle in the body and the square of its perpendicular distance from the axis of rotation. Symbol: I

## mo′ment of iner′tia

n.
the sum of the products of the mass and the square of the perpendicular distance to the axis of rotation of each particle in a body rotating about an axis.
[1820–30]
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 moment of inertia - the tendency of a body to resist angular accelerationinertia - (physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external forcemoment - a turning force produced by an object acting at a distance (or a measure of that force)
References in periodicals archive ?
The global water redistribution between the oceans and continental polar ice leads to periodical changes of the principal moment of inertia C, followed by the Earth rotation variations, according to the law of the angular momentum conservation.
The polar ice thickness increases and the mean sea level decreases during the bicentennial cold events, followed by the decrease of the mean Earth radius and the principal moment of inertia relative to the rotational axes.
The longest real MSL observations are used to prove the bicentennial model of solar activity variation--climatic variations--global water redistribution between the ocean and continental polar ice--variations of the principal moment of inertia C--Earth rotation variations, according to the law of angular momentum conservation;

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