momentum

n. force of movement; product of the mass of a body of matter multiplied by its velocity (Physics, Mechanics); strength or motivation derived from an initial effort

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. For more accurate measures of momentum, see the section "modern definitions of momentum" on this page. It is sometimes referred to as linear momentum to distinguish it from related subject of angular momentum.
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Momentum, n quantity of motion, expressed as the product of mass and velocity. momentum the quantity of motion; the product of mass and velocity. [more]Momentum - Community and Resources

Noun
1. an impelling force or strength; "the car's momentum carried it off the road"
(synonym) impulse
(hypernym) force, forcefulness, strength
2. the product of a body's mass and its velocity; "the momentum of the particles was deduced from meteoritic velocities"
(hypernym) physical property
(hyponym) angular momentum

n. momentum, force of movement; product of the mass of a body of matter multiplied by its velocity (Physics, Mechanics); strength or motivation derived from an initial effort