Here's why:
* Every object with mass has a gravitational field. This field extends outward in all directions from the object's center.
* The strength of the field decreases with distance. The farther away you get from an object, the weaker its gravitational pull.
* The direction of the force is always towards the center of mass. This is why objects fall downwards towards the Earth, which is the center of mass for our planet.
Think of it like this: Imagine a bowling ball placed on a trampoline. The bowling ball creates a dip in the trampoline, and if you roll a smaller ball near the bowling ball, the smaller ball will roll down the slope towards the center of the dip, which is the center of the bowling ball.
Similarly, the Earth's gravitational field pulls objects towards its center of mass, causing them to fall downwards.
