* Mass matters: The strength of the gravitational force between two objects depends on their masses. The more massive an object, the stronger its gravitational pull.
* Distance matters: The force of gravity also decreases rapidly with distance. The farther apart two objects are, the weaker the gravitational pull between them.
Here's an example:
* The Earth has a much larger mass than a small rock. Therefore, the Earth exerts a much stronger gravitational force on the rock than the rock exerts on the Earth.
* If you jump off a cliff, you are pulled towards the Earth by its gravity. However, you are also pulling on the Earth with a tiny gravitational force, but it's so small that it's practically negligible.
So, while gravity affects everything, the strength of that force depends on the mass of the objects involved and the distance between them.