A lot vs. Alot: 9 Grammatical Pitfalls
velocity ve·loc·i·ty (və-lŏs'ĭ-tē)
Rapidity or speed of motion; specifically, the distance traveled per unit time.
The speed and direction of motion of a moving body. Velocity is a vector quantity. Compare acceleration, speed.
The vector giving the speed and direction of motion of any object.