What is "momentum"

Momentum \Mo*men"tum\, n.; pl. L. Momenta, F. Momentums. [L. See Moment.]

1. (Mech.) The quantity of motion in a moving body, being always proportioned to the quantity of matter multiplied by the velocity; impetus.

2. Essential element, or constituent element.

   I shall state the several momenta of the distinction in separate propositions.
   --Sir W. Hamilton.

3. A property of an activity or course of events, viewed as analogous to forward motion or to physical momentum (def. 1), such that the activity is believed to be able to continue moving forward without further application of force or effort; -- often used to describe an increase in the acquisition of public support for a purpose; as, as, the petition drive gained momentum when it was mentioned in the newspapers.

1690s, scientific use in mechanics, "quantity of motion of a moving body," from Latin momentum "movement, moving power" (see moment). Figurative use dates from 1782.

n. 1 (context physics English) (of a body in motion) The tendency of a body to maintain its inertial motion; the product of its mass and velocity. 2 The impetus, either of a body in motion, or of an idea or course of events. (i.e: a moment)

1. n. an impelling force or strength; "the car's momentum carried it off the road" [syn: impulse]

2. the product of a body's mass and its velocity; "the momentum of the particles was deduced from meteoritic velocities"

3. [also: momenta (pl)]

In classical mechanics, linear momentum, translational momentum, or simply momentum ( pl. momenta; SI unit kg m/s is the product of the mass and velocity of an object, quantified in kilogram-meters per second. It is dimensionally equivalent to impulse, the product of force and time, quantified in newton-seconds. Newton's second law of motion states that the change in linear momentum of a body is equal to the net impulse acting on it. For example, a heavy truck moving rapidly has a large momentum, and it takes a large or prolonged force to get the truck up to this speed, and would take a similarly large or prolonged force to bring it to a stop. If the truck were lighter, or moving more slowly, then it would have less momentum and therefore require less impulse to start or stop.

Like velocity, linear momentum is a vector quantity, possessing a direction as well as a magnitude:

p = mv, 

where is the three-dimensional vector stating the object's momentum in the three directions of three-dimensional space, is the three-dimensional velocity vector giving the object's rate of movement in each direction, and is the object's mass.

Linear momentum is also a conserved quantity, meaning that if a closed system is not affected by external forces, its total linear momentum cannot change.

In classical mechanics, conservation of linear momentum is implied by Newton's laws. It also holds in special relativity (with a modified formula) and, with appropriate definitions, a (generalized) linear momentum conservation law holds in electrodynamics, quantum mechanics, quantum field theory, and general relativity. It is ultimately an expression of one of the fundamental symmetries of space and time, that of translational symmetry.

Momentum is the debut studio album from American recording artist TobyMac. It was released on November 6, 2001, through ForeFront Records.

The album was well received and was nominated for a Grammy. It contains a message of tolerance and diversity in society.

Musically it has an urban pop sound which HM commented contains shadows of early DC Talk material. In 2003, Re:Mix Momentum was released.

Momentum is a July 26, 2003 television film that premiered on the U.S. Sci Fi Channel. The film was directed by James Seale.

Momentum and angular momentum are concept in physics.

Momentum may also refer to:

Momentum is the ninth solo album by guitarist Steve Hackett. It is Hackett's second album consisting mainly of classical guitar pieces. Hackett's younger brother, John, plays the flute on the album. The album was re-released on Hackett's Camino Records label in 2001, with three bonus tracks.

Momentum is a studio album released by jazz pianist Dave Burrell. It was recorded in November 2005 and released a year later on November 14, 2006 by the label High Two.

The first three tracks on the album were originally composed by Burrell to accompany the restored French silent film Body and Soul (1925) directed by Oscar Micheaux.

Momentum is a 2005 album by jazz saxophonist Joshua Redman. All compositions are original works unless otherwise noted.

Momentum is the first album by Steve Lacy to be released on the Arista Novus label. It was released in 1987 and features six of Lacy's compositions (although tracks 2 and 3 only appeared on the CD edition) with texts by Giulia Niccolai, Herman Melville, and Brion Gysin performed by Lacy, Bobby Few, Steve Potts, Jean-Jacques Avenel, Oliver Johnson and Irene Aebi.

Momentum and rate of change (ROC) are simple technical analysis indicators showing the difference between today's closing price and the close N days ago. Momentum is the absolute difference in stock, commodity:

Rate of change scales by the old close, so as to represent the increase as a fraction,

"Momentum" in general refers to prices continuing to trend. The momentum and ROC indicators show trend by remaining positive while an uptrend is sustained, or negative while a downtrend is sustained.

A crossing up through zero may be used as a signal to buy, or a crossing down through zero as a signal to sell. How high (or how low when negative) the indicators get shows how strong the trend is.

The way momentum shows an absolute change means it shows for instance a $3 rise over 20 days, whereas ROC might show that as 0.25 for a 25% rise over the same period. One can choose between looking at a move in dollar terms, relative point terms, or proportional terms. The zero crossings are the same in each, of course, but the highs or lows showing strength are on the respective different bases.

The conventional interpretation is to use momentum as a trend-following indicator. This means that when the indicator peaks and begins to descend, it can be considered a sell signal. The opposite conditions can be interpreted when the indicator bottoms out and begins to rise.

Momentum was the first film shot and released in the IMAX HD film format, which ran at 48 frames per second, and was also one of the first films to use Ambisonic surround sound. The film was produced for the Canada pavilion at Seville Expo '92 by National Film Board of Canada, by the same creative team that made the 1986 3D IMAX film Transitions for Expo 86. The film takes viewers across Canada, demonstrating the ability of the 48 frame/s process to portray motion on the giant IMAX screen with reduced strobing.

Momentum is 3-D planar EM simulation software for electronics and antenna analysis, a partial differential equation solver of Maxwell's equations based on the method of moments. It is a 3-D planar electromagnetic (EM) simulator used for passive circuit analysis.

It combines full-wave and quasi-static EM solvers to provide insight into EM behavior of MMIC, RFIC, RF Board, Signal Integrity, and antenna designs. The Momentum simulation engine is integrated into Keysight ADS and Keysight Genesys.

It was originally developed by a Belgian company, Alphabit, a spinoff from IMEC. Early contributors to the technology include Niels Faché, Jan Van Hese, Frank Libbrecht, Jeannick Sercu, Luc Vandormael, Mieke Herreman, Peter Kok, Tom Dhaene and Krist Blomme.

The company was acquired by Hewlett-Packard, later it became part of Agilent Technologies and since November 2014 it is part of Keysight Technologies EEsof division, the current owners.

Momentum Under the Influence is a surf movie distributed by Steelhouse Distribution and produced by Poor Specimen. It features all the best surfers in the world under 23 that surf places like Mentawai Islands, Australia, South Africa, France, Timor Island, Indonesia, Mexico, Hawaii and California. Surfers include CJ Hobgood, Damien Hobgood, Paul Roach Dan Malloy, David Rastovich, Mick Fanning, Taj Burrow, Joel Parkinson, Ben Bourgois, Bruce Irons, Andy Irons, and Dean Morrison.

Momentum is the fourth full-length studio album by post-hardcore band Close to Home, released on July 31, 2012, through Artery Recordings/ Razor & Tie. It is the band's first album with vocalist Andrew DeNeef, after the departure of Nick Stiens in November 2011.

The album was produced, engineered and mixed by Andrew Wade ( A Day to Remember, Motionless In White) at his Wade Studios in Ocala, Florida.

The song "Family Ties" features guest appearances by David Stephens and Kyle Pavone, both the vocalists of metalcore band We Came as Romans.

Momentum is the ninth progressive rock album by Neal Morse, released in September 2012. The album features Mike Portnoy on drums, and Randy George on bass. The title track "Momentum" was released in late July 2012, along with a music video. Guests include Eric Gillette on backing vocals, along with Paul Gilbert and Adson Sodré on electric guitar.

Momentum is the sixth studio album by Jamie Cullum. It was released on 20 May 2013 by Island Records and is produced by Dan the Automator and Jim Abbiss. The album includes covers of " Love for Sale" (which he earlier recorded for his independent album Heard It All Before) and Anthony Newley's " Pure Imagination". The song "You're Not the Only One" was written about Cullum's experience serving as a judge on the television reality series Must Be The Music.

Momentum is the first EP by American rapper Stevie Stone. The EP was released on October 23, 2012, by Strange Music. The album features guest appearances from Kutt Calhoun and Spaide Ripper. The album debuted at number 196 on the Billboard 200 chart.

In finance, momentum is the empirically observed tendency for rising asset prices to rise further, and falling prices to keep falling. For instance, it was shown that stocks with strong past performance continue to outperform stocks with poor past performance in the next period with an average excess return of about 1% per month.

The existence of momentum is a market anomaly, which finance theory struggles to explain. The difficulty is that an increase in asset prices, in and of itself, should not warrant further increase. Such increase, according to the efficient-market hypothesis, is warranted only by changes in demand and supply or new information (cf. fundamental analysis). Students of financial economics have largely attributed the appearance of momentum to cognitive biases, which belong in the realm of behavioral economics. The explanation is that investors are irrational, in that they underreact to new information by failing to incorporate news in their transaction prices. However, much as in the case of price bubbles, recent research has argued that momentum can be observed even with perfectly rational traders.

Momentum is a live album recorded in 1972 at Groningen, the Netherlands, by the American jazz pianist Bill Evans with a trio including Eddie Gómez on bass and Marty Morell on drums.

Momentum is a 2015 South African–American action thriller film directed by Stephen Campanelli, and starring Olga Kurylenko, Morgan Freeman and James Purefoy.

Momentum is a British left-wing political organisation. It was founded in 2015 by Jon Lansman, four weeks after Jeremy Corbyn's successful campaign for the Labour Party leadership. It has been described as a grassroots movement supportive of Corbyn and the Labour Party.

In February 2016, Momentum agreed to set up a paid formal membership structure, which would require that those wanting to join must support the values and aims of the Labour Party. There are around 50 local groups across the UK. Momentum has about 12,000 members.