What causes gravity? - Physics Stack Exchange
Feb 8, 2011 · 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? - NASA
Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe. Sir Isaac Newton (1642 -- 1727) discovered that a force is required to change the speed or ...
general relativity - Why would spacetime curvature cause gravity ...
Mar 12, 2014 · Aug 27, 2022 at 2:11. Because this is a fundamental thesis of general relativity: when bodies do not subjec to any forces, they follow a geodesic path. Since gravity is not a force, it's the manifesto of curved spacetime. When an apple detaches from a tree, it's not moving through space, but it's moving through time.
What is gravity and what causes the existence of gravity?
Feb 2, 2020 · 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?
Nov 30, 2020 · 0. In Newtonian mechanics, mass is what causes gravitational "pull". It is a pull,and only a pull, between any two masses and all masses. The magma is not itself a source of gravitational force, but the reason why it is so hot is a cause of the gravitational force. Planets form from relatively small space rocks, called asteroids, and smaller ...
What is the true nature of gravity? - Physics Stack Exchange
Aug 20, 2021 · 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 ...
Does gravity CAUSE the bending of spacetime, or IS ...
Jun 27, 2018 · So asking whether gravity causes the bending of spacetime or whether gravity is the bending of spacetime is completely a question of semantics. The highest voted answer by Kai tries to discuss "what causes gravity?" which is a fundamentally meaningless question in physics.
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 ...
What causes gravity in M-Theory? - Physics Stack Exchange
Analogously, the graviton, a vibration level in the M-membrane, will build up the classical gravitational field of Newtonian physics. by Eric Zaslow on how from the gravitons eventually Einstein equations emerge. certainly there is no great organizing principle of string theory (yet). One practical principle is that the 2-dimensional (quantum ...
How exactly does curved space-time describe the force of gravity?
The thing that regulates the strength at which gravity operates is the thing that measures the "strength" of motion. No other force is like this: gravity was the only force of which charge is the same as the "strength" of motion. 2.Galilean Relativity Another feature of Newton's mechanics is that it obeys Galilean Relativity. Which yielded a ...