Momentum
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In classical mechanics, momentum (pl. momenta; SI unit kg·m/s, or, equivalently, N·s) is the product of the mass and velocity of an object (). Like velocity, momentum is a vector quantity, possessing a direction as well as a magnitude. Momentum is a conserved quantity (law of conservation of linear momentum), meaning that if a closed system is not affected by external forces, its total momentum cannot change. Momentum is sometimes referred to as linear momentum to distinguish it from the related subject of angular momentum. Although originally expressed in Newton's Second Law, the conservation of momentum also holds in special relativity and, with appropriate definitions, a (generalized) momentum conservation law holds in electrodynamics, quantum mechanics, quantum field theory, and general relativity. In relativistic mechanics, non-relativistic momentum is further multiplied by the Lorentz factor. From Wikipedia under the
GNU Free Documentation License Matching Results for Momentum:: EpitaphsLists unusual, inspiring, or wry epitaphs and headstone inscriptions from the graves of famous historical figures. From Wikiquote. Werner Heisenberg Variant translation: The more precisely the position is determined, the less precisely the momentum is known in this instant, and vice versa. ... Portal (game) Momentum, a function of mass and velocity, is conserved between portals. In layman's terms, speedy thing goes in, speedy thing comes out. ... From Wikiquote under the
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