The Mystery of the Moon
It is certain that Isaac Newton was not the first human being to wonder Why doesn’t the moon fall?«.
Man has always seen with curiosity that enormous stone floating in the sky, without support, threatening to fall on us.
However Newton He was the first man who came up with the answer: if the Moon does not fall on Earth, just like an apple falls, it is: «Because it’s moving»which counteracts the force of the gravity and keeps it in orbit.
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That same conjunction of forces keeps Earth and planets spinning in their orbits around the Sun permanently.
Furthermore, if the Earth attracts the Moon, it does so with less force than an apple, because the satellite is much further away.
Universal Gravitation
Newton derived the law of universal gravitation of that comparison between the forces that act on the Moon and those that act on the objects of daily life.
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According to this law, every body attracts another with a force directly proportional to their masses and inversely proportional to the square of the distance that separates them.
In other words, if the distance from the Earth to the Moon were reduced by half, the force of gravity would increase four times between them.
What are the three basic laws of motion?
On the Moon most of the flags are still firmly on the surface.
The first is that every body continues in its state of rest or motion unless a force is applied to it.
This force, he says the second lawis equal to the mass of the body multiplied by the acceleration it produces on it.
the third law is that if a body exerts a force on another, this will exert an equal and opposite force on the first.
To prove his theories, Newton invented an advanced form of calculus, the infinitesimal, which is still used today.
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