Quote:
Originally Posted by Saludeen
[You must be logged in to view images. Log in or Register.]
I prefer water over koolaid.
Look at this quote, "Gravity is the curvature of space-time due to the dynamical imposition of a mass on the fabric of space-time itself."
|
The answer depends on which system you are working in, and what you understand by gravity.
In the Newtonian framework, gravitational effects can be treated as the results of an applied (natural) force. In the relativistic framework, gravity can be treated as the natural bending of spacetime due to the presence of a massive object.
At the end, I must mention that at the fundamental level, all our currently existing scientific theories are all models which are designed to give predictions which match observed phenomenon. In "reality" gravity, if something like it actually exists at all, may not be anything like what we now believe. We put our faith in our established theories because they make reasonably accurate predictions which match with observations. That does not imply that gravity really works in the way we think it does. The results, obtained logically, are equivalent so the theories are held to be 'true'.
Also, gravity is whatever it happens to be that makes things fall to the earth, and things still fall to the earth, so we'll never say that there's no gravity. It's just that it's no longer considered to be a force that applies via Newton's Second Law, but a curvature of spacetime that acts via the geodesic principle, which is the relativistic equivalent of Newton's First Law.
Spacetime tells matter how to move
Matter tells spacetime how to curve
With that being said. Please drink some more water