1. An interaction: Force is the result of an interaction between two objects. This interaction can be direct contact (like pushing a door) or indirect (like the gravitational pull between Earth and the moon).

2. A change in motion or deformation: The interaction must cause a change in the object's motion (acceleration) or its shape (deformation). This change doesn't have to be visible – even a tiny change in shape can indicate the presence of a force.

Here's a simple explanation:

* Imagine pushing a box across the floor: You are interacting with the box, and your push is causing the box to move (accelerate). This movement is the result of the force you are applying.

* Consider a stretched rubber band: You are interacting with the rubber band by stretching it. This interaction causes the rubber band to change shape, which is a result of the force you are applying.

In summary, force is the result of an interaction that leads to a change in motion or deformation.