# inertia

## Definitions

• WordNet 3.6
• n inertia a disposition to remain inactive or inert "he had to overcome his inertia and get back to work"
• n inertia (physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force
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Webster's Revised Unabridged Dictionary
• Inertia Inertness; indisposition to motion, exertion, or action; lack of energy; sluggishness. "Men . . . have immense irresolution and inertia ."
• Inertia (Med) Lack of activity; sluggishness; -- said especially of the uterus, when, in labor, its contractions have nearly or wholly ceased.
• Inertia (Physics) That property of matter by which it tends when at rest to remain so, and when in motion to continue in motion, and in the same straight line or direction, unless acted on by some external force; -- sometimes called vis inertiæ. The inertia of a body is proportional to its mass.
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Century Dictionary and Cyclopedia
• n inertia Lack of activity; sluggishness; passiveness; inertness.
• n inertia In physics, that property of matter by virtue of which it retains its state of rest or of uniform rectilinear motion so long as no foreign cause changes that state. Also called vis inertiæ (force of inertia). Quantitatively considered, inertia is the same as mass. The term was introduced by Kepler. See mass and momentum.
• n inertia In medicine, want of activity; sluggishness: a term especially applied to the condition of the uterus when it does not contract properly in parturition.
• n inertia With regard to a plane or point, the sum of the elements of mass each multiplied by the square of its distance from the given plane or point.
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Chambers's Twentieth Century Dictionary
• n Inertia inertness: the inherent property of matter by which it tends to remain for ever at rest when still, and in motion when moving
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## Quotations

• Alexis Carrel
“Life leaps like a geyser for those who drill through the rock of inertia.”
• W. Clement Stone
“So many fail because they don't get started -- they don't go. They don't overcome inertia. They don't begin.”
• W. Clement Stone
“The natural law of inertia: Matter will remain at rest or continue in uniform motion in the same straight line unless acted upon by some external force.”
• W. Clement Stone
“That's why many fail -- because they don't get started -- they don't go. They don't overcome inertia. They don't begin.”
• St. John Perse
“The only menace is inertia.”
• Edward Dahlberg
“The machine has had a pernicious effect upon virtue, pity, and love, and young men used to machines which induce inertia, and fear, are near impotent.”

## Etymology

Webster's Revised Unabridged Dictionary
L., idleness, fr. iners, idle. See Inert
Chambers's Twentieth Century Dictionary
Fr.,—L. inersin, not, ars, art.

## Usage

### In literature:

Autumn with its soft inertia lulled him to sleep.
"Pipefuls" by Christopher Morley
The varieties of this lack of power and inertia are familiar to every physician.
"Psychotherapy" by Hugo Münsterberg
The inertia of past centuries as to slavery was too great to be overcome.
"The Journal of Negro History, Volume 5, 1920" by Various
A great difficulty in realising this view of Experience is to be found in the apparent Solidity and Inertia of material bodies.
"Essays Towards a Theory of Knowledge" by Alexander Philip
Error set in motion continues indefinitely, all according to the physical law of inertia.
"Little Journeys to the Homes of the Great, Vol. 13" by Elbert Hubbard
For that sort of inertia in woman is always enigmatic and therefore menacing.
For many years the colored people of the South reaped precisely this harvest of mental inertia.
"Carl and the Cotton Gin" by Sara Ware Bassett
Fear and inertia had him by the foot.
"Little Journeys to the Homes of the Great, Volume 11 (of 14)" by Elbert Hubbard
They are almost without exception the victims of the same epidemic of moral inertia and emotional heavings.
"A Circuit Rider's Wife" by Corra Harris
It was Joe Sykes, the wages of whose children kept him in active drunkenness and chronic inertia.
"The Bishop of Cottontown" by John Trotwood Moore
It was something approaching inertia, and she knew its cause.
"The Heart of Unaga" by Ridgwell Cullum
Her father, with the inertia of coming years, hated to be disturbed.
"A Little Girl of Long Ago" by Amanda Millie Douglas
Nor does this interpretation of the divine purposes of life lead the least in the world to inertia and dull passivity.
"The Life Radiant" by Lilian Whiting
The amount of this resistance is called its inertia.
"Chambers's Edinburgh Journal, No. 457" by Various
Arab vigour and the Islamic spirit proved unable permanently to leaven the vast inertia of the ancient East.
"The New World of Islam" by Lothrop Stoddard
It is due to inertia.
"Folkways" by William Graham Sumner
But still she could not wholly rouse herself from the dumb inertia that gripped her.
"The Return of Peter Grimm" by David Belasco
The inertia which marked the brilliant decadence of the Bourbon monarchy was finally overcome.
"The Life of Napoleon Bonaparte" by William Milligan Sloane
What is called centrifugal force is in truth only inertia.
"Myths and Marvels of Astronomy" by Richard A. Proctor
But many heads did not move at all, and he knew what their inertia meant.
"Where the Souls of Men are Calling" by Credo Harris
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### In news:

Practical Physics Student Activity- Inertia and Newton's First Law.
Medical marijuana in Los Angeles has an inertia that's a marvel to behold.
In art as in life, Meg Torbert was unhampered by inertia.
The Washington Canoe Club and National Park Service Inertia.
Inertia Boys and Girls Center promotes learning through doing.
Fed's Brave Steps Contrast with ECB's Inertia.
"There just seems to be a huge amount of energy and inertia behind the health care industry that to me makes it interesting, and in Northeast Ohio especially," he said.
Inertia Boys and Girls Center promotes learning through doing .
Inertia and big mass leads to pain, broken teeth, the usual.
It's far from unanimous, but many believe Newton's law of inertia will kick in even if the fedreal statute that launched changes in the nation's health care system is found unconstitutional.
Only inertia will bring people to Michel Gondry's 3-D spectacle, The Green Hornet .
Fidelity Magellan and the Power of Inertia.
Diving and the Moment of Inertia.
On contact at high speed, the form punch will want to bounce back a little to overcome the stagnant inertia of the strip.
N ature does not take kindly to inertia.
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### In science:

Imax /I⊥ is the ratio of the maximal to minimal moments of inertia.
Physics of Grain Alignment
Unlike the ambipolar diffusion, this mechanism operates even in ideal MHD and relies only on the difference in inertia of atoms and grains.
Physics of Grain Alignment
The restriction to the inertia of the action of G on X is Ω-linear.
Ramification of local fields with imperfect residue fields
G1+ = P, where P is the wild inertia subgroup of G.
Ramification of local fields with imperfect residue fields
In Eq.(3.2), the moment of the inertia I = J/Ω is used.
General Relativistic Modification of a Pulsar Electromagnetic Field
The irrotationality of the superﬂuid ﬂow has important manifestations like, for instance, the peculiar behavior of the moment of inertia and the occurrence of quantized vortices.
Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids
The moment of inertia can be deﬁned as the response, Θ = limΩ→0 hLz i/Ω, to a rotating ﬁeld of the form Hrot = −ΩLz, where Lz is the third component of the angular momentum operator.
Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids
The explicit relationship between the scissors mode and the moment of inertia was derived in .
Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids
In case H is a normal subgroup of a ﬁnite group G, A = kG and B = kH, the stabilizer subgroup (or inertia subgroup) L for a simple B -module V consists of all g ∈ G such that g V ∼= V .
Clifford correspondence for algebras
Let f (P′′Ei |p) be the inertia degree of P′′Ei over E .
On Cebotarev sets
K |Q(R(K |Q)), ℓ a prime number dividing the order of the inertia group Tp(K |Q) and K ′ = K (µ2ℓ ).
On Cebotarev sets
I Ω2, where I is the moment of inertia and Ω is the rotation frequency.
A Search for Gamma-Ray Bursts and Pulsars, and the Application of Kalman Filters to Gamma-Ray Reconstruction
Because the superﬂuid component does not contribute to the moment of inertia, the resonant frequency and the period of oscillation differ from those without superﬂuid.
Bose-Einstein condensation and superfluidity of dilute Bose gas in a random potential
The ordering of rotational energy levels depends on the sign of the corresponding moments of inertia, which have been evaluated with the Thouless-Valatin formula.
How random are random nuclei? Shapes, triangles and kites
I = R ρr2d3r is the moment of inertia and pb the pressure on the box (assumed uniform).
Generalized thermodynamics and Fokker-Planck equations. Applications to stellar dynamics, two-dimensional turbulence and Jupiter's great red spot
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