Here's why:
* Force is a push or pull that can cause a change in motion.
* Speed is the rate at which something moves, and it's a scalar quantity (only magnitude, no direction).
* Force vectors have both magnitude (how strong the force is) and direction (the way the force is applied).
Example:
Imagine pushing a box across the floor. The force vector would point in the direction you're pushing and its length would represent the strength of your push. The speed of the box is how quickly it moves across the floor.
Think of it this way: A force vector tells you *how hard* and *in what direction* you're pushing, but not *how fast* something is moving.
