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Gravity Research Project Essay

1063 words - 5 pages

Lucius Gardner
Mrs. Henry
AP Physics
16 February 2016
Gravity Research Project
Over the past several hundred years there have been many great scientists that have come up with significant ideas and theories in the scientific field of gravitational research. These scientists include but are not limited to Aristotle, Galileo, Kepler, Newton and Einstein! Each one of these scientist have come along after another, using each other’s ideas to further expand the human species’ knowledge on gravity and how it works. They have each left a unique mark on the scientific community.
The Greek philosopher Aristotle was the first of his kind, coming up with the first theory about gravity even ...view middle of the document...

Johannes Kepler follows after Galileo in the line of contribution to our understanding of gravity. Kepler’s contributions in the early 1600s were three laws of planetary motion: The Law of Ellipses, The Law of Equal Areas, and The Law of Harmonies. The first law states that the path of the planets about the sun is elliptical in shape, with the center of the sun being located at one focus. The second law says that an imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time. And the third law of planetary motion says that the ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun. Kepler’s attempts to describe his reasoning behind these motions aren’t currently accepted in the scientific community, but they do still consider these laws as accurate portrayals of the motions of planets and satellites.
Sir Isaac Newton had some very important discoveries in this field of study, basing them off of the ideas of Galileo and Kepler. What Newton is probably most famous for are his three laws of motion. Newton’s first law of motion states that objects continue to move in a state of constant velocity, which can be zero, unless acted upon by an external force. Newton’s second law of motions states that the rate of change of momentum of a body is proportional to the resultant force acting on it, and will be in the same direction. Newton’s third law of motion states that the force on an object is always due to another object; all forces act in pairs that are equal in magnitude and opposite in direction. Newton also came up with the law of universal gravitation. This law stat that every mass attracts every other mass in the universe, and the gravitational force between two bodies is proportional to the product of their masses, and inversely proportional to the square of the distance...

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