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Even when you are reading this article, the earth is moving. Yes, the earth is continuously moving. Earth is revolving and we all are revolving, but we don’t feel this movement of the earth, known as earth rotation or earth’s rotation.
Except for the movement of the earth’s rotation, we all exert and feel some kind of gravitational force. Every object is attracted to every other object by the gravitational force. Still, most of the time, this gravitational force is very minute, but as the earth is very big and we are very minute in respect to the earth’s size, we feel the gravitational force of the earth that is known as gravity also.
Body:
Earth is continuously revolving around the sun and the speed of revolution of the earth rotating around the sun is 30 kilometres per second. You can say 67000 miles per hour to 30 kilometres per second. At this speed, the earth moves in a circular motion around the sun. This circular motion of the earth around the sun is known as revolution. This type of velocity at which the earth revolves around the sun is known as revolutionary Velocity.
The earth is continuously rotating on its axis. Earth completes one rotation in 24 hours. The exact time taken by Earth for completing one rotation is 23 hours and 56 minutes. The velocity at which the earth rotates on its axis is 1674 kilometres per hour. So earth rotates at this velocity. This velocity of the earth is known as rotational velocity and this type of motion of the earth is known as rotational motion and the rotation of the earth is known as earth rotation.
The earth’s rotational velocity depends on the latitude at which we are calculating the speed, but at the equator, the speed of the earth is 1674 kilometres per hour.
Earth revolves around the sun in an anticlockwise direction.
Gravitation
Every object of the universe feels attraction towards another object. It is the natural phenomenon of the universe. Every planet, every object, everything is exerting some kind of gravitational force. Gravitation is known as gravity also.
You will have seen or read about the ocean tides. Those ocean tides are a result of the moon’s gravity.
The weight of every material thing on earth results from Earth’s gravity.
Our solar system is because of gravity. All the planets exert some kind of gravitational force and that gravitational force bonds the solar system. The direction of the gravitational force exerted by the earth is opposite to the direction of the object moving upwards.
Gravitational force is considered a universal force.
Sir Isaac Newton discovered gravity. He explained the gravitational theory in 1665. Newton was born in the United Kingdom in 1642.
The difference between gravitation and gravity is that gravitation is the force of attraction between every two objects present in the universe and gravity is the Gravitational force between earth and any other object. Gravitation is considered a universal force, but gravity is not considered a universal force.
Gravitation is directly proportional to the multiplication of the masses of those two objects, between which we are calculating the Gravitational force. Gravitation is inversely proportional to the distance between those two objects for which we are calculating gravitational force.
The direction of gravity is considered towards the centre of the earth. At the same time, the direction of the Gravitational force is considered along the radial direction of the masses.
The effect of gravitational force is very weak, while the effect of gravity is quite strong. There is a need for objects with two masses in gravitational force, but there is a need for only one mass in gravity. When the earth rotates on its axis is known as earth rotation.
If the distance between two objects is infinite, the gravitational force will be zero, but the gravity will be zero at the earth’s centre.
Gravitation is a physical quantity of a vector, while gravity has its field of the vector.
There are two popular laws for Gravitation. They are Newton’s Law and Kepler’s law.
Conclusion:
Most people get confused and think that gravitational force and gravity are the same while both are different. Gravitational force is the universal force, while gravity is not the universal force. I have also discussed the differences between gravitation, earth rotation and gravity. There are two famous theories of gravitational force. One is given by Sir Isaac Newton and one by Kepler. Both theories are known as Newton’s law and Kepler’s law also. I have also discussed the moon’s gravity. Ocean tides are an example of the moon’s gravity. We all feel attraction towards the things around us, but we don’t observe it because this force is very weak.
It was all about Gravitation and gravity.
