# pendulum

## Definitions

• Morse's pendulum instrument
• WordNet 3.6
• n pendulum an apparatus consisting of an object mounted so that it swings freely under the influence of gravity
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Webster's Revised Unabridged Dictionary
• n Pendulum A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery.☞ The time of oscillation of a pendulum is independent of the arc of vibration, provided this arc be small.
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Century Dictionary and Cyclopedia
• n pendulum Anything that hangs down from a point of attachment and is free to swing.
• n pendulum In mech., a body so suspended from a fixed point as to move to and fro by the alternate action of gravity and its acquired energy of motion. The time occupied by a single oscillation or swing is counted from the time of the descent of the pendulum from the highest point on one side till it attains the highest point on the opposite side. This time is called the period of oscillation of the pendulum. A simple pendulum in the mechanical sense is a material particle suspended by a weightless rod and moving without friction. A single weight attached by a string, etc., approximates to an ideal simple pendulum. The period of oscillation of a simple pendulum in vacuo is
• n pendulum A chandelier or lamp pendent from a ceiling.
• n pendulum A guard-ring of a watch and its attachment, by which the watch is attached to a chain.
• n pendulum A pendulum that at some point of its path closes a circuit, this in turn either reporting the beats of the pendulum at distant stations for time-comparisons, or directly controlling a number of clocks. See electric clock, under clock.
• n pendulum See the adjectives.
• n pendulum A pump in which the reciprocating motion of the piston is controlled by a pendulum.
• n pendulum A pump the handle of which swings on either side of its center of suspension.
• n pendulum A pendulum consisting of a spherical bob suspended from a cord or wire.
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Chambers's Twentieth Century Dictionary
• n Pendulum pen′dū-lum any weight so hung from a fixed point as to swing freely: the swinging weight which regulates the movement of a clock: a lamp, &c., pendent from a ceiling: a guard-ring of a watch by which it is attached to a chain
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## Etymology

Webster's Revised Unabridged Dictionary
NL., fr. L. pendulus, hanging, swinging. See Pendulous
Chambers's Twentieth Century Dictionary
L., neut. of pendulus, hanging—pendēre, to hang.

## Usage

### In literature:

The pendulum that has swung to one extreme will surely find the other.
"Pulpit and Press" by Mary Baker Eddy
We cross the Sisto on the same kind of vibrating or pendulum boat as on the Po.
"Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson" by Thomas Jefferson
It was now the turn of the defence, and some thought the pendulum might swing back again.
"Oscar Wilde, Volume 1 (of 2)" by Frank Harris
The pendulum was returning once more toward a strong executive, and to centralization.
"A Short History of France" by Mary Platt Parmele
The pendulum complied, and ticked six times in its usual pace.
"Parker's Second Reader" by Richard G. Parker
Still the results were disappointing and at that very time the pendulum was beginning to swing backward.
"History of the United States" by Charles A. Beard and Mary R. Beard
At first this forked arm was not thought of, for the pendulum itself formed a part of the verge.
"Watch and Clock Escapements" by Anonymous
There has been too great severity in interpreting the law of proof and the pendulum is bound to swing far in the opposite direction.
"The Man in Court" by Frederic DeWitt Wells
Such as "The Clock," in which they beat the hours, swing for the pendulum, etc.
"Juliana Horatia Ewing And Her Books" by Horatia K. F. Eden
He wondered whether he could swing the crowd to the other side, like the pendulum of a clock.
"The Banner Boy Scouts" by George A. Warren
A girl in gilt bronze was holding a cup and ball, and the ball formed the pendulum.
"The Works of Guy de Maupassant, Volume IV (of 8)" by Guy de Maupassant
He seemed to swing between his crutches exactly as a pendulum swings in a tall clock.
"Maida's Little Shop" by Inez Haynes Irwin
In my youth, the pendulum swung towards excess, now its reaction being exactly opposite; both extremes to my mind are wrong.
"My Life as an Author" by Martin Farquhar Tupper
Bunter would go on swinging up and down the poop like a deliberate, dignified pendulum.
"Tales Of Hearsay" by Joseph Conrad
A series of pendulums will do just as well.
"Scientific American Supplement, No. 717, September 28, 1889" by Various
Now you look at that clock; watch that pendulum swingin'.
"Jerome, A Poor Man" by Mary E. Wilkins Freeman
I have to act like a heavy weight in a clock movin' half the time, or he would be jest swept to and frow like a pendulum.
"Samantha at the World's Fair" by Marietta Holley
Ay, in "The 'Genius'" the pendulum swings back again!
"A Book of Prefaces" by H. L. Mencken
The opening of 1793, however, saw the pendulum swing back.
"The French Revolution" by R. M. Johnston
The chest was loosed, and swung like a pendulum lengthwise of the room, down almost to the floor and up nearly to the ceiling.
"Double Trouble" by Herbert Quick
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### In poetry:

And round and round an oaken beam
A hempen cord they flung,
And, like a mighty pendulum,
All solemnly he swung!
"The Spectre Pig" by Oliver Wendell Holmes
The pithy elder copses sigh;
Their broad blue combs with berries weighed,
Like heavy pendulums are swayed
With ev'ry gust that hurries by.
"A November Sketch" by Madison Julius Cawein
So swings the pendulum! The slayer shall
Be victim of the slain, the conqueror
Be beaten of the lifted manacle,
Slaves trample on thy head, Imperator;
"The Pendulum" by Dame Mary Gilmore DBE
Well, Time with his snuffers is prowling about
And his shaky old fingers will soon snuff us out;
There's a hint for us all in each pendulum tick,
For we're low in the tallow and long in the wick.
"The Smiling Listener" by Oliver Wendell Holmes
The innocent word that sets remembrance trembling,
The dubious word that sets the scared heart beating . . .
The pendulum on the wall
Shakes down seconds . . . They laugh at time, dissembling;
Or coil for a victim and do not talk at all.
"The House Of Dust: Part 03: 09:" by Conrad Potter Aiken
You say: 'We sit and talk, of things important . . .
How many others like ourselves, this instant,
Mark the pendulum swinging against the wall?
How many others, laughing, sip their coffee—
Or stare at mirrors, and do not talk at all? . . .
"The House Of Dust: Part 03: 09:" by Conrad Potter Aiken

### In news:

Watch Plié Pendulum in the Fitness Video.
Watch Shoulder Pendulum in the Fitness Video.
The Power Pendulum Swings Toward Washington.
Stephen James O'Meara's secret sky: The Pit and the Pendulum .
Carrier Pricing and the Impact of Diesel Fuel: Is the Pendulum Swinging.
The Pit And The Pendulum .
THE PIT AND THE PENDULUM I have a gift today for my two or three conservative readers.
Test pendulum has swung too far.
View an interactive timeline of Nuclear Power Pendulum on CBS News, complete with photos, historical facts, and much more.
Perils of the Pendulum Resisting Education's Fads.
The political pendulum had swing back to the right.
4, 2011) Chicago-based singer, songwriter and guitarist Eric D Johnson has an artistic pendulum that constantly swings back and forth.
But the pendulum is swinging back.
Rates have dropped, but recent settlements may swing the pendulum in the other direction.
The Pendulum Swings Away From Cynicism .
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### In science:

Figure(2) the motion of pendulum won’t be simple harmonic.
How simple is simple pendulum
One of the basic experiments which a physics student will try out is that of the pendulum.
Linearisation of Simple Pendulum
T is the time period of the pendulum using non-linear EOM.
Linearisation of Simple Pendulum
As for the Kapitza pendulum, we average over the fast oscillation and obtain an effective Hamiltonian for the slow motion.
Out-of-equilibrium states as statistical equilibria of an effective dynamics
The energy equations (34) represent in this case the two uncoupled pendulums of the unperturbed Hamiltonian.
Non-Integrability of a weakly integrable Hamiltonian system
I(qe )−1µ0 (qe ) wil l be T-stable for τ > 0 smal l. A direct application of this criterion to the double spherical pendulum recovers the stability result on the bifurcating branches proved directly in .
Symmetry breaking for toral actions in simple mechanical systems
We used a common sewing thread as the pendulum cord.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Araki, “Measurement of simple pendulum motion using ﬂux-gate magnetometer,” Am. J.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Fogg, “A simple formula for the large-angle pendulum period,” Phys.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Schery, “Design of an inexpensive pendulum for study of large-angle motion,” Am. J.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Molina, “Simple linearization of the simple pendulum for any amplitude,” Phys.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Curtis, “The simple pendulum experiment,” Phys.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Armstrong, “Effect of the mass of the cord on the period of a simple pendulum,” Am.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
Zilio, “Measurement and analysis of large-angle pendulum motion,” Am. J.
An accurate formula for the period of a simple pendulum oscillating beyond the small-angle regime
The upper disc (2.0 mm thick Al) was at a variable separation of 0.2 mm to 11 mm and acted as a torsion pendulum.
New Regions for a Chameleon to Hide
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