Here's why:

* Force is a push or pull that can change an object's motion.

* Interaction describes how objects influence each other.

When one object exerts force on another, they are interacting. This interaction can involve:

* Contact forces: These involve direct physical contact between objects, like pushing a door or a ball hitting a wall.

* Non-contact forces: These involve forces acting at a distance, like gravity or magnetism.

Let me know if you'd like more detail on any of these concepts!