When forces cancel each other and do not change an object's motion, it is called equilibrium.

Here's a breakdown:

* Equilibrium refers to a state where all forces acting on an object are balanced. This means the net force (the sum of all forces) is zero.

* No change in motion means the object will either remain at rest (static equilibrium) or continue moving at a constant velocity (dynamic equilibrium).

Let me know if you'd like to explore examples of equilibrium!