parallelogram of momenta
Parallelogram Par`al*lel"o*gram, n. [Gr. ?; ? parallel + ? to write: cf. F. parall['e]logramme. See {Parallel}, and {-gram}.] (Geom.) A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles. [1913 Webster]

{Parallelogram of velocities}, {parallelogram of forces}, {parallelogram of accelerations}, {parallelogram of momenta}, etc. (Mech.), a parallelogram the diagonal of which represents the resultant of two velocities, forces, accelerations, momenta, etc., both in quantity and direction, when the velocities, forces, accelerations, momenta, etc., are represented in quantity and direction by the two adjacent sides of the parallelogram. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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• parallelogram of accelerations — Parallelogram Par al*lel o*gram, n. [Gr. ?; ? parallel + ? to write: cf. F. parall[ e]logramme. See {Parallel}, and { gram}.] (Geom.) A right lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; sometimes… …   The Collaborative International Dictionary of English

• parallelogram of forces — Parallelogram Par al*lel o*gram, n. [Gr. ?; ? parallel + ? to write: cf. F. parall[ e]logramme. See {Parallel}, and { gram}.] (Geom.) A right lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; sometimes… …   The Collaborative International Dictionary of English

• Parallelogram of velocities — Parallelogram Par al*lel o*gram, n. [Gr. ?; ? parallel + ? to write: cf. F. parall[ e]logramme. See {Parallel}, and { gram}.] (Geom.) A right lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; sometimes… …   The Collaborative International Dictionary of English

• Parallelogram — Par al*lel o*gram, n. [Gr. ?; ? parallel + ? to write: cf. F. parall[ e]logramme. See {Parallel}, and { gram}.] (Geom.) A right lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; sometimes restricted in popular …   The Collaborative International Dictionary of English

• Method of quantum characteristics — In quantum mechanics, quantum characteristics are phase space trajectories that arise in the deformation quantization through the Weyl Wigner transform of Heisenberg operators of canonical coordinates and momenta. These trajectories obey the… …   Wikipedia

• Force — For other uses, see Force (disambiguation). See also: Forcing (disambiguation) Forces are also described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate …   Wikipedia