Newton's Law of Universal Gravitation:
* Force is proportional to mass: The force of gravity depends directly on the masses of the objects involved. The Earth is incredibly massive compared to a human or an apple.
* Force is inversely proportional to distance: The force of gravity also depends on the distance between the objects. We are very close to the center of the Earth, while the apples are even closer to each other.
Let's break it down:
1. Mass: The Earth is much heavier than a human, and a human is much heavier than an apple. This difference in mass creates a much larger gravitational force between the Earth and us than between two apples.
2. Distance: We are relatively far from the center of the Earth (the Earth's radius is about 6,371 kilometers), but this distance is still significantly smaller than the distance between two apples.
The Result:
These factors combined mean that the gravitational force between the Earth and a human is immense compared to the force between two apples. While the force between the apples is practically negligible, the force between the Earth and us is what keeps us grounded.
Important Note: The force of gravity is always present, but it's only noticeable when dealing with objects of considerable mass, especially when one object is much larger than the other.
