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momentum

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mo⋅men⋅tum

[moh-men-tuhm]
–noun, plural -ta [-tuh] , -tums.
1. force or speed of movement; impetus, as of a physical object or course of events: The car gained momentum going downhill. Her career lost momentum after two unsuccessful films.
2. Also called linear momentum. Mechanics. a quantity expressing the motion of a body or system, equal to the product of the mass of a body and its velocity, and for a system equal to the vector sum of the products of mass and velocity of each particle in the system.
3. Philosophy. moment (def. 7).

Origin:
1690–1700; < L mōmentum; see moment
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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mo·men·tum   (mō-měn'təm)   
n.   pl. mo·men·ta (-tə) or mo·men·tums
  1. Symbol p Physics A measure of the motion of a body equal to the product of its mass and velocity. Also called linear momentum.

    1. Impetus of a physical object in motion.

    2. Impetus of a nonphysical process, such as an idea or a course of events: The soaring rise in interest rates finally appeared to be losing momentum.

  2. Philosophy An essential or constituent element; a moment.


[Latin mōmentum, movement, from *movimentum, from movēre, to move; see meuə- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

momentum

In physics, the property or tendency of a moving object to continue moving. For an object moving in a line, the momentum is the mass of the object multiplied by its velocity (linear momentum); thus, a slowly moving, very massive body and a rapidly moving, light body can have the same momentum. (See Newton's laws of motion.)

Note: Figuratively, momentum can refer to the tendency of a person or group to repeat recent success: “The Bears definitely have momentum after scoring those last two touchdowns.”
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

momentum 
1699, "quantity of motion of a moving body," from L. momentum "movement, moving power" (see moment). Fig. use dates from 1782.
Online Etymology Dictionary, © 2001 Douglas Harper
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Financial Dictionary

Momentum

The rate of acceleration of a security's price or volume.

Investopedia Commentary

Once a momentum trader sees an acceleration in a stock's price, earnings, or revenues, the trader will often take a long or short position in the stock with the hope that its momentum will continue in either an upwards or downwards direction. This strategy relies more on short-term movements in price rather then fundamental particulars of companies, and is not recommended for novices.

Related Links

Market Strength Tutorial
Momentum Trading with Discipline
Getting Confirmation with the Momentum Strategy
Introduction to Types of Trading: Momentum Traders

See also: Contrarian, Countertrend Strategy, Momentum Fund, Style

Investopedia.com. Copyright © 1999-2005 - All rights reserved. Owned and Operated by Investopedia Inc.
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Financial Dictionary

momentum

The tendency of a security to continue movement in a single direction. Momentum is the underlying factor in trend analysis of stock prices.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Medical Dictionary

Main Entry: mo·men·tum
Pronunciation: mO-'ment-&m, m&-'ment-
Function: noun
Inflected Form: plural mo·men·ta /-'ment-&/ or momentums
: a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's massand velocity; broadly : a property of a moving body that determines the length of time required to bring it to rest when under the action of a constant force
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Encyclopedia

momentum

product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion.

Learn more about momentum with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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