Gravity is a fundamental force in the universe that affects many aspects of our lives. Thanks to this force, the Earth, other planets and stars are held together. So what is gravity and how was it found? In this article, we take a detailed look at the answers to these questions.
What is Gravity?
Gravity is the force of an object pulling another object. This force depends on the mass of the objects and the distance between them. That is, the greater the mass of an object, the greater the gravitational force on another object. Likewise, the farther the distance between the objects, the less the gravity.
How was gravity discovered?
Gravity is a force that affects every living thing on Earth and can be felt at any time. However, the discovery of this concept has been realized as a result of many years of research and studies.
BC In the 4th century, Aristotle’s realization that heavy objects fall faster than light objects was one of the first steps in the concept of gravity. However, Aristotle could not explain why objects fell straight to the ground. The work of the Italian physicist Galileo proved that air exerts a frictional force and that all objects fall at the same speed when this frictional force is removed.
Isaac Newton has worked for years to understand and explain the concept of gravity. Newton discovered that objects have a gravitational force according to their own mass, and he understood that objects fall directly to the ground due to the gravitational force exerted on the earth by this force. According to this theory, the force of attraction between two masses is directly proportional to the size of the masses and inversely proportional to the square of the distance between them.
Newton’s theory of gravity was a quantum leap in physics and astronomy. However, in 1915, Albert Einstein brought a different perspective with his general theory of relativity. According to Einstein’s theory, gravity occurs due to the curvature of space-time.
Today, the concept of gravity is based on both Newton’s theory and Einstein’s general theory of relativity. The discovery of this concept has an important place in human history and is the result of years of research by scientists. Gravity is an effective force in every aspect of our lives and is an important source of information for humanity.
Gravity according to Albert Einstein
Albert Einstein is one of the most important figures in the history of physics. General relativity, with its innovative approach to the concept of gravity, revolutionized the world of physics. Gravity, according to Einstein, is not gravity, but arises as a result of the bending of space.
Einstein explained this concept by thinking of space as a leaf. Massive objects bend space like a ball on a sheet and pull the surrounding objects towards them. This is also reflected in observable events, such as the orbits of planets.
This theory of Einstein is also valid for people or objects moving freely in space. For example, imagine an elevator being dropped freely from the top of a skyscraper. The people in it have no weight and can hang in the air. Likewise, astronauts in a spacecraft going into orbit have no weights.
Einstein’s general theory of relativity explains the concept of gravity differently than previously understood. Gravity arises as a result of the bending of space, and the gravitational fields of massive objects pull the objects around them towards them.
This new understanding still forms the basis of the work of physicists today. Albert Einstein’s innovative approach to the concept of gravity has revolutionized the world of physics and occupies an important place in modern physics.
Newton or right Einstein? Which theory is correct?
The concept of gravity is one of the most important topics in the history of physics and two important names stand out: Isaac Newton and Albert Einstein.
Newton is one of the names who first described gravity and explained the reason for this force. Newton discovered that objects gravitate on each other according to their own masses, and that this gravitational force is inversely proportional to the size of the masses and the square of the distance between them. While Newton’s theory gives accurate results for small objects, it can be misleading for larger objects.
Einstein, on the other hand, brought a new explanation for the concept of gravity with his general theory of relativity. According to Einstein, gravity arises as a result of the bending of space, and massive objects pull in the objects around them, bending space like sheets. Einstein’s theory is more comprehensive than Newton’s theory and gives more accurate results about the massive objects of the universe.
However, in everyday natural phenomena, Newton’s rules still apply and accurate results can be obtained. Einstein’s theory is used to understand and explain the behavior of very massive objects.
As a result, Newton’s and Einstein’s theories differ from each other and both are valid for different conditions. While Newton’s theory forms the basis of physics concepts used in everyday life, Einstein’s theory occupies an important place in modern physics. There is no definitive answer as to which theory is correct, but both theories have made great contributions to the world of physics.
How is gravity measured?
Gravity is a measurable force and can be measured in many ways. Some of these are those:
1. The plumb bob method
The plumb-bob method is one of the oldest methods of measuring gravity. In this method, a weight is suspended from the ground using a rope. While weight moves freely on a flat surface, it moves downwards under the influence of gravity.
2. Recording method
The shot method is a modern gravity measurement method. In this method, an object is thrown down from a certain height and the fall time is measured. With this fall time, gravity can be calculated.
3. Gravimeter method
The gravimeter method is one of the most sensitive gravity measurement methods. This method uses a special instrument called a gravimeter. The gravimeter has a vibrating mass to measure the effect of gravity.
What is Gravity?
Gravity is the force that pulls an object toward the center of the Earth. This force depends on the ratio of the mass of the object to the mass of the Earth.
Who discovered the concept of gravity?
The concept of gravity was discovered by Isaac Newton. Newton, in his book “Mathematical Principles”, published in 1687, defined the universal law of gravity that explains gravity.
How is gravity measured?
Gravity is measured as the weight of an object. This force causes an object on the Earth’s surface to be pulled toward the ground and can be calculated using Newton’s law of gravity.
What happens when there is no gravity?
In the absence of gravity, humans and animals become sedentary and have feeding difficulties. Plants cannot release their seeds into the soil and the protective effect of the atmosphere disappears.
Where on Earth is the gravitational velocity higher?
Gravity is strongest at the center of the Earth and weakest at the poles.
Why is gravity important?
Gravity is essential for the growth and development of plants and animals. It is also important in space exploration.
Why is gravity important for space exploration?
Gravity is used to bring spacecraft back to Earth.
How does gravity affect health?
Research in space has shown that people who are far from gravity for a long time develop health problems.
How does planetary gravity differ?
The gravity of other planets is different from Earth’s gravity. For example, the gravity on Mars is lower than on Earth.