Q:

Is velocity a vector?

A:

Velocity is a vector since it is composed of a quantity of speed and a direction. Velocity is defined as the rate at which an object's position changes.

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The direction of the velocity vector is simply the direction that the object is moving. For example, it is not sufficient to say something has a velocity of 20 miles per hour, when this is only the scalar quantity of speed. Adding a northward direction, this becomes a velocity of 20 miles per hour northward. It is important to note that since velocity is a vector quantity, operations, such as addition, subtraction and dot product, are not the same as scalar quantities.

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