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Weightlessness The definition and use of Weightlessness is difficult. Weight means the jam exerted by gravity, burdenless means the absence of such forces and lightness officially means the condition of zero gravitational force. In popular use, however, metric weight unitlessness (often with quotation marks) has the meaning given in the front paragraph. Astronauts and cosmonauts in the International Space Station be state to meet weightlessness, even though, at an altitude of a a couple of(prenominal) blow km, their weight (the gravitational force acting on them) is exactly active 10% less than on earth. Their battlefield has a large receptive quickening towards the earth and their weight is the centripetal force producing it. However, the space station has (almost) exactly the aforementioned(prenominal) acceleration towards the earth. Consequently, in the frame of the space station, an unsupported mortal appears to father no acceleration and so his relative com municate in this frame is the same as that of a psyche without weight in a spacecraft that is not accelerating. If objects be removed from a star, planet, moon, or other such extensive body, so that they experience very little gravitational interaction with them, they would speak to the condition of zero gravity.

If they ar close to a massive object, but are unornamentedly accelerating towards the mass by gravitational acceleration only, they are in  resign fall and are weightless. Physically, they both follow Newtons first law of motion which describes unidimensional motion. Such a situation, except for micrograv ity effects and the in homogeneousness of t! he gravitational field cannot be distinguished from weightlessness collectible to the absence of gravity from a body nearby. As an example, an reanimate free fall trajectory results in the weightlessness of objects in a falling elevator. The same type of accelerated free fall trajectory causes weightlessness of objects in orbit  approximately the Earth. Such objects are in free fall toward the Earth, as in the falling elevator, but they...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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