Definition of gravity

Definition of gravity

Traditionally, it is said that gravity is the force of attraction that is subject to any body that is in the vicinity of Earth. However, we can point out other interpretations that we will see in this article. In addition, we will know what causes gravity, what is his theory and even some curiosities. We will travel from Aristotle to Newton and analyze what is Gravity?

 What is Gravity? | Definition

Gravity is the force with which bodies attract. Basically, it is the force that acts to prevent us from floating and staying united to Earth. One of the effects of gravity is to decelerate any body that we throw up. In fact, it creates the opposite effect when the object stops and begins its fall. In this case, gravity will attract it to Earth at a higher speed.


If we throw a ball upwards it will slow down its upload speed. It will do so thanks to the force of gravity that attracts the ball to Earth. There will come a time when the ball stops and begins its descent. As the ball begins to descend, its speed will increase.

what is the severity

At present it is believed that gravity is, in reality, an illusion and not a force of attraction. This was defended by Albert Einstein in 1915. “An effect of geometry. The Earth deforms the space-time of our environment, so that the space itself pushes us towards the ground “.

That interpretation of gravity is part of Einstein’s Theory of General Relativity. However, the classical interpretation of gravity is the Law of Universal Gravitation, originally formulated by Isaac Newton.

Definition of gravity? | First Theories

Since ancient times, man has sought answers to doubts that through observation and knowledge have emerged. Since the dawn of human history, man has known that objects are attracted to the ground. Simply, with observation, you come to that knowledge.

what is the gravity aristoteles

What is Gravity? – First Theories | Aristotle S.IV a.C.

In the 4th century. a.C., the philosopher Aristotle developed his theory about the relationship between the causes and effects of those causes. His theory holds that everything that happens, necessarily, has a cause. Thus, he maintained the existence of an invisible force that draws us to the center of the universe. Bearing in mind, of course, that Earth was the center of the universe and everything revolved around it.

Gravity according to Aristotle

The first name that this force received was Gravitas. His theory contained some faults as believing that there was a different gravity according to the mass of the body. Thus, two different bodies, with different masses, are attracted with different force by gravity.

Therefore, a lightweight object such as a paper ball will suffer a lower attractive force than a steel bar. According to Aristotle, the force of gravity will be greater. Therefore, according to his theory, gravity does not have a constant value. This theory was accepted for almost 20 centuries.

What is Gravity? – First Theories | Copernicus S. XVI d.C.

Copernicus provoked a true reaction in society and in the sciences of the sixteenth century. The sun was the center of the universe. As we have seen so far, Earth was the center of the universe. A truth accepted and supported by religious beliefs that dominated all aspects of society.

Copernicus was not aware of the extraordinary size that the universe had. In fact, he focused on the Solar System, the only thing that was known about Astronomy at that time. This theory could amend the first error that the philosopher Aristotle had committed.

Planisphere of Copernicus explaining the heliocentric system

As we know, this theory bothered a Church that was still convinced that man, God’s creation, was the center of the universe. If Earth is not the center of the universe, all of Aristotle’s gravitational theory would fall apart. Now Earth is no longer the center of the universe, but we are still attached to it. That is, the Earth exerts the responsible force for things to fall.

March 5, 1616, the Church stops Copernicus from “Copernicus”
March 5, 1616, the Church forbids Copernicus “De revolutionibus orbium coelestium”
This theory managed to dispel some doubts and correct some errors, but they raised new questions. For example, what happens with other planets? Will they have gravity? If the sun does not revolve around the Earth, why then does the Earth revolve around the sun?

Definition of gravity? – First Theories | Galileo Galilei S. XVI – XVII d.C.

Galileo a man of mathematical vocation, despite his father’s efforts to study medicine. Interested in the fall of bodies, he begins to perform experiments on falling objects on inclined planes.

what is the gravity galileo

He lived for many years in the city of Pisa, where his experiments began to reveal data. Obsessed by the pendular movement and movement by inclined planes, he managed to develop formulas on accelerated movement. Thus, he came to the conclusion that gravity was a constant force in all bodies, thus amending another of the errors of Aristotle’s theories.

It is said that he spent many hours experimenting from the Tower of Pisa. In it, I tried to measure the time it took for an object to touch the ground. In the churches, he was doing calculations to measure the pendulum movement of the censers

definition of specific gravity.? – First Theories | Kepler S. XVI – XVII d.C.

Johannes Kepler, was a Protestant pastor believer in God, but also a strong follower of the Copernicus theory. With a different interpretation of the creation of God, where the duty of the good Christian is to try to understand and know the work of God, and of course the solar system was a work of God.

what is the gravity kepler telescope keplerian

In this way, he contributed to the work of Copernicus and Galileo, transcending the borders of Catholic Europe, and became known and accepted in Protestant Europe. He described as a complex system created by God to get the planets to keep spinning. Among his works are the three laws in which the movement of the planets is described with great precision, spinning in elliptical orbits.

what is the gravity the laws keppler

The most widespread theory to be able to give answer to all these unknowns, was based on the existence of two forces of gravity. One that affects the objects of Earth. Another that seems to be a celestial force that gets the planets to turn.

What is Gravity? – First Theories | Newton S. XVII – XVIII d.C.

It seemed that everything was becoming clear, until a new question arose that was difficult to answer. If Earth attracts objects towards her, what is it that makes the Moon not rush against Earth? The answer was simple: one force for the Earth, and one for the planets and the Moon, as something isolated.

what is the gravity newton apple

Newton, as a man of science and knowledge, was obsessed with finding the reason why the Moon did not fall on Earth. Why the planets moved. In these circumstances was when the famous fall of the apple occurred. This apple was the beginning of a treaty that revolutionized science: “Law of Universal Gravitation”.

what is the gravity law gravitation universal.

With all the studies that either Copernicus, Kepler or Galileo had contributed, Newton had what it took to give a rigorous explanation. Both for the movement of the planets, and for the force that prevents the Moon from rushing. I just had to unite all these data to verify that it is the same force, the gravity, the one that makes apples fall and that the moon does not.

what is the gravity moon

Two objects with different masses, such as the apple and the Earth, attract each other. Meanwhile, the force of gravity before less disparate masses such as the Moon and Earth, acts separating them. Converting this force into a universal force.

What is Gravity? | Law of Universal Gravitation

The force of attraction of the Earth, gravity and gravitation, are defined by the Law of Gravity (or Law of Universal Gravitation).

box calculations
The Law of Gravity determines that two bodies with mass, whatever they are, attract one towards the other with a force F. The force with which one is attracted to the other is proportional to the mass of each one (m and m1) . In addition, it is inversely proportional to the square of the distance (r) that separates them. This is the general formula:

m1 and m2 are the masses of the two bodies
r is the distance that separates its centers of gravity and scriptstyle G is the universal gravitation constant.
The value of the constant is equal to the force, measured in newtons, with which two masses of 1 kg located at 1 m distance attract each other, that is, a value equal to 6.67. 10-11.

Definition of gravity? | Gravity center

The center of gravity is defined as the point of application of the resultant of all the actions of gravity on the particles that make up a body.

planets solar system

This point is different in each body and its position is constant, whatever the direction, direction and orientation to which the body is subject. It is as if all the weight of the body met at that point.

What is Gravity? | Acceleration of Gravity

If a body falls in the direction of Earth, the rate of fall of the body increases as it approaches the Earth’s surface. It is said then that the movement of the body is an accelerated movement. This action of gravity is called the acceleration of gravity, and its symbol is usually the letter g.

what is the gravity fall free

Acceleration of gravity

The acceleration is the increase of the speed in m / s in every second of movement, that is, meters / second². Meanwhile, the acceleration of gravity increases when you go from the equator to the poles, a little more than 5% of your speed.

The normal acceleration gn, that is, the acceleration at 45º north latitude and at sea level, allows to establish the gravity according to a unit of force.

definition for gravity | Curiosities About Gravity

We know that gravity is the force of attraction that Earth exerts. But there are many other curiosities about the seriousness that you may not know.


How much would it weigh on another planet? – Gravity changes depending on the planets. We are used to the gravity of Earth, but what would happen if we went to another planet? If it is Jupiter, a person who weighs 75 kg, will weigh more than 160. In contrast, if that planet is Pluto (although since 2006 it is no longer a planet, but a dwarf planet), that same person would hardly reach the 5 kilos of weight.

what is the gravity gravity solar system

Returning Astronauts – When astronauts return from space, they have to spend some time adapting to return to the Earth’s gravity. This happens because there is no gravity in space, the muscles become numb and the blood pressure has to work less intensely.
Floating I go – On the other hand, when returning to Earth, astronauts who have spent a lot of time in space must get used to returning to Earth, because objects do not float.
Strong and weak – Gravity is one of the strongest laws and at the same time weakest. On the one hand, they have great strength and importance since absolutely all the objects of the Earth are governed by the laws of gravity. On the other hand, it is one of the weakest forces, since with a simple electromagnetic magnet an object can be attracted by overcoming the force of gravity of the Earth.

what is the severity lack severity

Hudson Bay – Gravity is not the same in all places on Earth and may vary by zones. For example, it has been discovered that there is less gravity in Hudson Bay than in the rest of the planet. Scholars believe that this may be due to the existence of ancient glaciers in the area. These glaciers, thousands of years ago, crushed the Earth, decreasing its mass and gravity.
Attraction, yes; repel, no – Yes, gravity is a force capable of attracting bodies to the planet, but it is not capable of doing the opposite, that is, it can not repel bodies.

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defying gravity lyrics

definition of gravity physics

Defying gravity lyrics

Something has changed within me
Something is not the same
I’m through with playing by the rules of someone else’s game

Too late for second-guessing
Too late to go back to sleep
It’s time to trust my instincts
Close my eyes and leap!

It’s time to try
Defying gravity
I think I’ll try
Defying gravity
Kiss me goodbye
I am defying gravity
And you wont bring me down!

I’m through accepting limits
‘cause someone says they’re so
Some things I cannot change
But till I try, I’ll never know!

Too long I’ve been afraid of
Losing love I guess I’ve lost
Well, if that’s love
It comes at much too high a cost!

I’d sooner buy
Defying gravity
Kiss me goodbye
I’m defying gravity
I think I’ll try
Defying gravity
And you won’t bring me down

I’d sooner buy
Defying gravity
Kiss me goodbye
I’m defying gravity
I think I’ll try
Defying gravity
And you won’t bring me down!
bring me down!
ohh ohhh ohhhh

Glee Cast – Defying Gravity Lyrics |

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