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mprm86
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How did Newton come to his gravity´s law? Could someone please explain his deduction of the law, or he just said: the force exerted by gravity between two planets is F = -Gm1m2r^-2 ?
Thanks in advance.
Thanks in advance.
Adrian Baker said:Don't forget Kepler's earlier Laws of Planetary motion. Newton would have been aware of these and this too would have helped him. Particularly so the relationship - Time period of planet squared is proportional to distance of planet cubed.
Newton's derivation of Gravity's law is a mathematical explanation of the force of gravity between two objects. It is based on Newton's law of universal gravitation, which states that every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Newton derived the law of gravity by combining his laws of motion with empirical observations made by previous scientists, such as Kepler's laws of planetary motion. He used mathematical equations and calculus to show that the force of gravity between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Newton's derivation of Gravity's law is significant because it provided a mathematical explanation for the force of gravity, which was previously only described as an observed phenomenon. It also helped to unify the laws of motion and gravity, and laid the foundation for future developments in physics.
One limitation of Newton's derivation of Gravity's law is that it only applies to objects with mass. It does not take into account other fundamental forces, such as the strong and weak nuclear forces, which are important at the subatomic level. Additionally, it does not fully explain the behavior of objects at extremely high speeds or in extreme gravitational fields.
Newton's derivation of Gravity's law has been extensively tested and has been found to accurately predict the force of gravity between objects in the macroscopic world. However, with advancements in technology and scientific understanding, it has been refined and expanded upon by other theories, such as Einstein's theory of general relativity, which better explain gravity at extreme scales.