A vector is a quantity or phenomenon that has two independent
properties: magnitude and direction. The term also denotes the mathematical
or geometrical representation of such a quantity.
Examples of vectors in nature are velocity, momentum, force, electromagnetic
fields, and weight. (Weight is the force produced by the acceleration of
gravity acting on a mass.) A quantity or phenomenon that exhibits magnitude
only, with no specific direction, is called a scalar. Examples of scalars
include speed, mass, electrical resistance, and hard-drive storage capacity.
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