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What is weightlessness force?
Weightlessness is the complete or near-complete absence of the sensation of weight. This is also termed zero-G, although the more correct term is “zero G-force”. It occurs in the absence of any contact forces upon objects including the human body.
Is weightlessness the absence of gravity?
The sensation of weightlessness, or zero gravity, happens when the effects of gravity are not felt. Technically speaking, gravity does exist everywhere in the universe because it is defined as the force that attracts two bodies to each other. But astronauts in space usually do not feel its effects.
What is weightlessness in a satellite?
Weightlessness in the satellite is a condition when an object or an astronaut does not sense most of its weight. According to Newton’s Third law, the surface also exerts an equal and opposite force on an object.
What’s another word for weightlessness?
Weightless synonyms In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for weightless, like: light, lightweight, light-as-a-feather, noiseless, ghostlike, weighty, frictionless and heavy.
What is the root word in weightlessness?
weightless (adj.) “having no weight,” 1540s, from weight (n.) + -less.
What causes weightlessness in orbit?
Earth-orbiting astronauts are weightless for the same reasons that riders of a free-falling amusement park ride or a free-falling elevator are weightless. They are weightless because there is no external contact force pushing or pulling upon their body. In each case, gravity is the only force acting upon their body.
What is the meaning of weightlessness in physics?
Weightlessness, condition experienced while in free-fall, in which the effect of gravity is canceled by the inertial (e.g., centrifugal) force resulting from orbital flight. The term zero gravity is often used to describe such a condition.
What is the meaning of weightlessness in free fall?
This is the weightlessness in free fall in a uniform gravitational field. (The situation is more complicated when the gravitational field is not uniform, or, when a body is subject to multiple forces which may, for instance, cancel each other and produce a state of stress albeit weight 2 being zero.
What is weightlessness in free fall in a uniform gravitational field?
If the body is placed on the scales in a lift (an elevator) in free fall in pure uniform gravity, the scale would read zero, and the body said to be weightless i.e. its weight 2 = 0. This describes the condition in which the body is stress free and undeformed. This is the weightlessness in free fall in a uniform gravitational field.
What are the effects of weightlessness on the Earth?
Weightlessness. In the case of the Earth, the effects are minor, especially on objects of relatively small dimension (such as the human body or a spacecraft) and the overall sensation of weightlessness in these cases is preserved. This condition is known as microgravity and it prevails in orbiting spacecraft.