Answer:
The displacement, the time and the direction
Step-by-step explanation:
The velocity of an object is defined as:
where
d is the displacement, which is a vector describing the change in position of the object
t is the time in which the displacement takes place
Since d (the displacement) is a vector, velocity is a vector as well: this means that it also has a direction, which corresponds to the direction of the displacement.
The magnitude of the velocity, insteand, is called speed.