Question

which of the following describes velocity? (1 point)
velocity is the sum of all of the forces acting on an object.
velocity is a force that changes an objects speed and/or direction.
velocity is the speed of an object in a particular direction.
velocity is the resistance of an object to a change in its speed or direction.

Explanation:

Velocity is a vector quantity. It has both magnitude (speed) and direction.
The first option describes net force ($F_{net}=\sum F$).
The second option describes acceleration - causing force (from $F = ma$).
The fourth option describes inertia.

Answer:

Velocity is the speed of an object in a particular direction.