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Who proposed the famous law of gravity, describing the force that pulls objects towards the Earth?
A. Albert Einstein
B. Isaac Newton
C. Galileo Galilei
D. Charles Darwin
Correct Answer Is Option = Isaac Newton
Notes / Explanation
The famous law of gravity, describing the force that pulls objects towards the Earth and that governs the motion of the heavenly bodies, was proposed by Isaac Newton, one of the greatest scientists in history. Gravity is the force of attraction that exists between objects, and it is the force that causes objects to fall towards the Earth when they are dropped, that gives objects their weight, and that holds things to the surface of the Earth. Before Newton, people knew that objects fell to the ground, but it was Newton who explained this in terms of a universal force of gravity and who set out the laws describing it. According to the famous account, Newton was led to think about gravity, and it is said that the sight of an object falling, such as an apple falling from a tree, contributed to his thinking about the force that pulls objects downward. Newton proposed that there is a force of attraction between all objects that have mass, and that this same force, which causes an apple to fall to the ground, also acts on a grand scale throughout the universe, holding the Moon in its path around the Earth and the planets in their paths around the Sun, so that the same force governs both the falling of objects on the Earth and the motion of the heavenly bodies. This was a profound and far-reaching idea, for it united the events on the Earth and the motions of the heavens under a single principle, and it was one of the great achievements in the history of science. Newton also set out the fundamental laws describing the motion of objects and the effect of forces upon them, which, together with his law of gravity, form the foundation of a large part of the science of physics and have been used to understand and predict the motion of objects and of the heavenly bodies with great success. Newton is regarded as one of the greatest scientists of all time, and his work had an enormous influence on the development of science. The study of the great scientists and their discoveries is a part of general knowledge. For PPSC and other competitive examinations, the key points to remember are that the famous law of gravity was proposed by Isaac Newton, that gravity is the force of attraction that pulls objects towards the Earth and gives them their weight, that Newton proposed that the same force governs both the falling of objects on the Earth and the motion of the Moon and the planets, and that he also set out the fundamental laws of motion, so that he is regarded as one of the greatest scientists of all time.
