- 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.
- 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.
- Philosophy. moment(def 7).
Origin of momentum
Examples from the Web for momentum
In conversation, her ideas emerge at a roiling boil that often takes on a momentum of its own.Daphne Merkin on Lena Dunham, Book Criticism, and Self-Examination
December 26, 2014
But in 2014, numerous states passed common-sense public safety laws, showing that the momentum for gun safety is building.The NRA’s Twisted List for Santa
December 23, 2014
Currency problems are procyclical, which is to say that they create their own momentum.Putin Can’t Bully or Bomb a Recession
December 16, 2014
Doing three in a row got a momentum going and I want to keep that momentum going.‘No Regrets’: Peter Jackson Says Goodbye to Middle-Earth
December 4, 2014
Bolstered by the momentum of Savage, Masters continued to accumulate up-and-coming conservative talent.The Godfather of Right-Wing Radio
November 23, 2014
All are full of the momentum which they have caught from their mode of conveyance.The Old Apple Dealer (From "Mosses From An Old Manse")
The ball once started gained size and momentum as it progressed.The Monster Men
Edgar Rice Burroughs
When within a few rods of each other we ceased paddling, and drifted by with the momentum.The Forest
Stewart Edward White
The momentum of the flywheel A pushes the piston upward, closing these holes.Boys' Book of Model Boats
Raymond Francis Yates
The momentum acquired seems to serve for the balance of the year.College Teaching
- physics the product of a body's mass and its velocitySymbol: p See also angular momentum
- the impetus of a body resulting from its motion
- driving power or strength
Word Origin and History for momentum
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.
- A vector quantity that expresses the relation of the velocity of a body, wave, field, or other physical system, to its energy. The direction of the momentum of a single object indicates the direction of its motion. Momentum is a conserved quantity (it remains constant unless acted upon by an outside force), and is related by Noether's theorem to translational invariance. In classical mechanics, momentum is defined as mass times velocity. The theory of Special Relativity uses the concept of relativistic mass. The momentum of photons, which are massless, is equal to their energy divided by the speed of light. In quantum mechanics, momentum more generally refers to a mathematical operator applied to the wave equation describing a physical system and corresponding to an observable; solutions to the equation using this operator provide the vector quantity traditionally called momentum. In all of these applications, momentum is sometimes called linear momentum. See also angular momentum impulse.
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.)