What is gravity? - NASA
Newton's "law" of gravity is a mathematical description of the way bodies are observed to attract one another, based on many scientific experiments and observations. The gravitational equation says that the force of gravity is proportional to the product of the two masses (m 1 and m 2 ), and inversely proportional to the square of the distance ...
What causes gravity? - Physics Stack Exchange
2011年2月8日 · What causes gravity may still be a vague question since gravity, as per current wisdom, is a fundamental interaction in nature. You just can not "explain" it from other simpler facts. Some recent attempts try to project it as less fundamental (like gravity is an entropic force).
What is gravity and what causes the existence of gravity?
2020年2月2日 · Gravity in some cases has been described as a fold in space time, as there seems to be a distortion in the continuum, and while analogies convey that objects just seems to fall into this distortion hence what I am asking is what is gravity exactly and how is this force existing in the universe, i.e. gravitational pull of the planets?
newtonian gravity - What causes gravitational force? - Physics …
2020年11月30日 · This is a very tricky idea, so its okay if it doesn't make sense. I bring it up simply because "gravity" itself is an especially strange case in that we have two different models of how the world works, and they treat it in two completely unrelated ways. So "what causes it" is going to be mired in the muck dealing with these different models.
general relativity - Why would spacetime curvature cause gravity ...
2014年3月12日 · Newtonian gravity had sufficed to explain the orbiting of planets and moons, but the explanation of the revolving of an orbit took GR, as it conflicted with the notion of gravity as an anthropomorphic "force", however subtle and faint the curvatures may seem at …
What is the true nature of gravity? - Physics Stack Exchange
2021年8月20日 · What we know is that gravity is an effect that causes the motion of particles to deviate from straight (Euclidian) lines, that it is an attractive rather than a repulsive effect, that it weakens with distance, that the effect propagates at the speed of light, that the strength of the effect is related to the degree to which matter and energy ...
Has it been experimentally proven that energy causes gravity?
2022年4月14日 · $\begingroup$ A nuclear reaction wouldn't "generate" gravity... the energy liberated by a nuclear reactor was always in the nuclei beforehand (i.e. in the mass of the fuel). The prediction is not that the reaction causes "more" gravity but that the reaction doesn't reduce gravity (since all the mass-energy is still there). Good luck keeping the ...
Does time dilation cause gravity as explained in this video?
The higher above the surface of the Earth you are, the slower the rocket has to accelerate to obtain the same acceleration caused by gravity, so time moves faster the higher you are (time is curved, which is also the case in a field with constant acceleration for every object, i.e. in a constant gravity field, though in this case of a constant ...
If gravity is not a force, what makes massive objects spheroid?
2024年5月7日 · Gravity is a "force" according to the conventional definition you learned in school - A force is a push or a pull. Gravity is a pull. Therefore it's a force by that definition. Another definition of "force" is something that causes acceleration. Well, gravity causes massive objects to accelerate toward each other. 2 for 2 so far. But wait!, you ...
What causes gravity in M-Theory? - Physics Stack Exchange
So and so to occur. This, in turn, creates gravity. In other words, I want a fresh description of how gravity works and generated in M-Theory. And please don't just say it predicts a graviton, give me I for on how exactly gravity gets generated according to the theory.