gravity is the attraction phenomenon that commands the movement of objects. On Earth, gravity is the property that causes bodies to be attracted to the center of the earth. This phenomenon is a consequence of the curvature formed in space-time of the solid object, according to Einstein's theory of relativity.
Gravity acts on the mass of an object and the greater the mass of that object, the greater its gravitational force. As the Earth's mass is greater than that of a person, the person is "drawn" to its center, which explains why objects fall. Each object has a gravity center, that is, the point where the force of gravity is exerted.
The Earth also exerts an attraction on the Moon, so it orbits around it. As the Sun has a much greater mass compared to the Earth, Earth is attracted by the Sun, orbiting around it.
The first to identify the phenomenon of gravity was Isaac Newton, who published a paper on gravitation in 1687. Later, in 1915, Albert Einstein broached the topic of gravity in the Theory of Relativity. For Einstein, space and time are like two intertwined threads that form the "fabric" of space-time. According to the renowned physicist, gravity is not seen as a force, but as a distortion of the fourth dimension known as "space-time".
Gravity is also a feminine noun that describes a serious, serious or negative situation. Ex: In the midst of the confusion, the citizen was seriously injured.
gravity acceleration
Gravity acceleration (or gravitational acceleration) is the intensity that the gravitational field exerts on objects.
O weight of a body is obtained by multiplying the mass by the acceleration due to gravity. the value of gravity acceleration on earth is standardized, being 9.80 m/s².
Gravity of the Planets and the Sun
| Celestial bodies | Gravity in meters / second² |
|---|---|
| Sun | 274.13 m/s2 |
| Mercury | 3.78 m/s2 |
| Venus | 8.60 m/s2 |
| Earth | 9.8 m/s2 |
| Mars | 3.72 m/s2 |
| Jupiter | 24.8 m/s2 |
| Saturn | 10.5 m/s2 |
| Uranus | 8.5 m/s2 |
| Neptune | 10.8 m/s2 |
| Pluto | 5.88 m/s2 |
| Moon | 1.67 m/s2 |
Zero gravity
Zero gravity is a physical state that exists in the absence of Earth's gravity force. Gravity often occurs in aircraft and spacecraft. The sensation of weightlessness is felt by someone when they are in free fall.
Prolonged exposure to zero gravity can have negative effects on humans, such as disorientation, vomiting, changes in the circulatory system, etc.
