1. Motion: A force can cause an object to start moving if it is at rest, stop moving if it is in motion, change its speed (accelerate or decelerate), or change its direction of motion.
2. Shape: A force can deform an object, changing its shape. Think of squeezing a ball or bending a piece of metal.
3. Speed: A force can cause an object to speed up (accelerate) or slow down (decelerate).
These three things are all related to the object's motion and position in space.
