Gravity: Theories
Gravity is one of the forces of nature that can be said to be a fundamental as well as universal force of nature , which, according to scientists, is one of the four forces of nature, namely, strong, weak, electromagnetic and gravitational. Physicists, to date have not been able to form a single formula that would explain all these forces of which gravity is one, as one single law. However, it is a fact that physicists have formulated a formula that mentions weak and electromagnetic forces, or in other words, the electroweak force. The other stronger gravitational forces have not been explained, however, with this theory. ( Fundamental Forces , n. d.) Gravity can be explained as an attractive force between all matters, and is considered to be one of the weaker forces. The reason why gravity is a weak force of nature is that its gravitational force depends upon the mass of the objects. For example, it is only when the object has a large mass that the attraction is larger, and the Earth is one such object. ( Gravity Definition Page , n. d.)It was Sir Isaac Newton who was able to give a mathematical definition to gravity, and he achieved this through his law of universal gravitation . According to this law, gravity is found to b
(Kurtus, 2007) This acceleration that has been caused as a result of the force of gravity on Earth and g would equal 9. However, recent facts have shown that the mutual gravitational pull that exists between the two galaxies is as strong as ever, and it is this pull that has brought about a strange phenomenon: the Great Galaxy in Andromeda is in fact moving towards us, and the rate is a light year, every four years. When an object is weighed on a scale, the measurement would actually be indicated according to the force of the Earth that is pulling it down. The most significant dynamic measuring techniques of gravity are (a) measuring a falling body s velocity and (b) measuring the period of a moving body based under the gravity force s attraction. Newton further divides these into 3 principal groups: effect or percussion, pressure, as also centripetal force. Several years ago, it was thought that our Galaxy and its neighbor Andromeda were driven apart because of the expansion of the Universe. Hence the weight can be described as really being the gravity force with regard to that object. With regard to spiral galaxies, the rotation curve is being utilized for measuring the mass of a star, or even of the complete galaxy. The acceleration due to gravity on the Moon (gm) is 1/6 of the value on the Earth (g). However, even today, scientists and physicists and space researchers ask themselves this important question: what are all the possible ways in which two objects in space attract each other? Some scientists also feel that gravity and expansion do not oppose each other; rather, it is motion that would be able to resist gravity effectively. (Piazza; Marinoni, 2003) However, there are many individuals who express the deepest skepticism about there being a bunch of particles making up dark space or dark matter , and Fred Cooperstock of Northeastern University and Steven Tieu of the University of Victoria feel that Einstein s theory with regard to general relativity would be able to explain why galaxies, especially the Milky way, remain in space and rotate without flying off. (Cohen; Smith, 2002)It must be remembered that Sir Isaac Newton theorized that material objects pull upon one another with a force that would enhance with the mass of these objects; Albert Einstein stated that it was the basic structure of space that must be considered responsible for gravity. The most significant of these relates to the forces which create accelerations or variations in the level of motion or relating to rest in bodies.
Common topics in this essay:
Theory Relativity,
Moon Kurtus,
Gravity Revealed,
Earth Strobel,
Isaac Newton,
Albert Einstein,
Principia Newton,
,
Solar System,
Gravity Space,
gravity force,
dark matter,
force gravity,
kurtus 2007,
solar system,
acceleration due gravity,
isaac newton,
= mg,
due gravity,
acceleration due,
escape velocity,
sir isaac newton,
described gravity force,
galaxies width absorption,
gravity definition page,
|
Acceptance Essays
