* Newton's Law of Universal Gravitation: This law states that every particle in the universe attracts every other particle with a force that is:
* Proportional to the product of their masses: The more massive the objects, the stronger the gravitational force.
* Inversely proportional to the square of the distance between their centers: The farther apart the objects are, the weaker the gravitational force.
* Even Tiny Objects: While the gravitational force between everyday objects is incredibly small and difficult to detect, it still exists. Think about two coins lying on a table. They do exert a gravitational force on each other, but it's so weak that it's completely overwhelmed by other forces like friction.
* Gravitational Force is Always Present: Even a single atom has a tiny gravitational pull. The force just becomes noticeable when you have a large enough collection of atoms (i.e., a significant mass).
Examples:
* The Earth and the Moon: The Earth's gravity keeps the Moon in orbit.
* You and the Earth: You are attracted to the Earth by its gravity, which is why you don't float away!
* Galaxies: The gravitational force between stars holds galaxies together.
In summary: Gravity is a fundamental force of nature, and it's always present. Even objects as small as atoms exert a gravitational force, though it may be incredibly weak for everyday objects.
