Newton's Law of Universal Gravitation:
* Force is proportional to mass: The more massive the objects, the stronger the gravitational force between them.
* Force is inversely proportional to the square of distance: The farther apart the objects are, the weaker the force becomes.
Why it's not noticeable:
1. Small Masses: Objects around us have relatively small masses compared to planets or stars.
2. Short Distances: The distances between everyday objects are tiny compared to the vast distances involved in astronomical scales.
Example:
Let's say you want to calculate the gravitational force between you (mass ~ 70 kg) and a chair (mass ~ 10 kg) sitting 1 meter away. The force would be incredibly tiny, measured in fractions of a Newton.
What about larger objects?
* Planets and Moons: These massive bodies have a strong enough gravitational pull to keep them in orbit around each other.
* Black Holes: These extremely dense objects have such intense gravity that nothing, not even light, can escape their pull.
In summary:
While gravity is a fundamental force of nature, its effect on ordinary objects in our daily lives is negligible due to their small masses and close proximity. It's only when we consider massive objects or vast distances that the force of gravity becomes significant.