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A scalar is a single force or quantity that is independent of other forces, such as speed. Speed can be 45 m/s or 60 mph. A vector is something that involves two forces, such â¦as velocity which is speed AND direction. For example, velocity can be 5 m/s North. 1 person found this useful.
a quantity possessing both magnitude and direction, represented by an arrow the direction of which indicates the direction of the quantity and the length of which is proportional to the magnitude. Compare scalar (def 4).