Speed in a certain direction or the rate of change of the position of an object.

For motion in one dimension, such as along the number line, velocity is a scalar and for motion in two dimensions or through three-dimensional space, velocity is a vector.

The rate at which a moving car changes its position when traveling in a given direction.

If a car goes around a corner without changing speed, its velocity changes because it changes direction.

The minimum velocity with which an object must be projected for it to escape from the gravitational pull of a planetary body.

To effectively escape the gravitational field of a star, planet, or other celestial body, a projectile must have a minimal velocity which has been worked out in a special formula.