The direction of a vector can be given in a written description, or drawn as an arrow. The length of an arrow represents the magnitude of the quantity . If one arrow is twice as long as another, it ... Vector , in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity ’s magnitude. Although a vector has magnitude and direction, it does not have position. Learn the difference between scalar and vector quantities in math and physics. A scalar has only magnitude, while a vector has both magnitude and direction. See examples of each type and how to operate on them. Study Vector Quantities in Geometry with concepts, examples, videos and solutions. Make your child a Math Thinker, the Cuemath way. Access FREE Vector Quantities Interactive Worksheets!