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xertion, or action; want of energy; sluggishness. Men . . . have immense irresolution and inertia. Carlyle.

The center of mass, inertia, or gravity of a body or system of bodies.

Having equal moments of inertia.

ends on a revolving axis, to regulate or equalize the motion of machinery by means of its inertia, where the power communicated, or the resistance to be overcome, is variable, as in the steam engine or the coining press. See Fly wheel (below).

Inertness; inertia. [R.] Good.

Absence of the power of self-motion; inertia.

trument by means of which the area of a figure can be measured directly, or its moment of inertia, or statical moment, etc., be determined.

into the perpendicular distance of its point of application from the plane. -- Moment of inertia, of a rotating body, the sum of the mass of each particle of matter of the body into the square of its distance from the axis of rotation; -- called also moment of rotation and moment of the mass. -- Statical moment, the…

ody to remain in a given state, either of motion or rest, till disturbed by another body; inertia. Cheyne.

a point conceived as being without extension, yet having physical properties, as weight, inertia, momentum, etc.; a material point. -- Physical signs (Med.), the objective signs of the bodily state afforded by a physical examination.

To counteract, as a force, by inertia or reaction.

Any return or succesion in a series. Moment of rotation. See Moment of inertia, under Moment. -- Rotation in office, the practice of changing public officers at frequent intervals by discharges and substitutions. -- Rotation of crops, the practices of cultivating an orderly succession of different crops on the same l…

Inertness; inactivity. Vis intertiæ and inertia are not strictly synonymous. The former implies the resistance itself which is given, while the latter implies merely the property by which it is given. -- Vis mortua Etym: [L.] (Mech.), dead force; force doing no active work, but only producing pressure. -- Vis vitæ, o…