![]() Newton’s laws of motion are still used to calculate and describe the movement of many physical phenomena today. Newton’s theoretical framework formed the basis of classical mechanics (the study of how objects move) until Albert Einstein established his theory of general relativity. It also allowed him to calculate the masses of planets and how the sun’s gravitational pull creates the tides on Earth. Newton went on to use his conception of gravity and motion to understand the way planets orbit. But in 1679, another English scientistĬalled Robert Hooke suggested that he apply his theories to planetary motion. Originally, Newton had only applied his conception of gravity and motion to phenomena he had observed on Earth. He did, however, receive some help along the way. Newton was the first to look at gravity and motion in this particular way. For Hypotheses are not to be regarded in experimental Philosophy.” This Analysis consists in making Experiments and Observations, and in drawing general Conclusions from them by Induction, and admitting of no Objections against the Conclusions, but such as are taken from Experiments, or other certain Truths. “As in Mathematics, so in Natural Philosophy, the Investigation of difficult Things by the Method of Analysis, ought ever to precede the Method of Composition. Newton believed that gravity looked as follows: particles of matter attract other particles with a force that is proportional to their masses, while inversely proportional to the square distance between them. It is also a function of both mass and distance. According to this theory, gravity is a universal and predictable force that acts on all matter. These laws were discovered as part of Newton’s broader study of gravity, which culminated in his theory of universal gravitation. For every action, there is an equal and opposite reaction. For example, a rocket produces a backwards force through the expulsion of gas.It also explains why a car that is heavier requires more force to travel at the same speed as a lighter car. ![]()
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