Is Gravity Just Inertia in Disguise?

In summary, the conversation discusses the possibility of gravity being explained as space itself shrinking directionally. This idea is similar to the "river model" of black holes, where space flows inward towards the massive object. However, it is noted that this model does not view space as actually shrinking, but rather flowing towards the center. The conversation also considers the time dilation effect and the acceleration of falling objects due to gravity in this context.
  • #1
Gomjabbar
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can you think of gravity as space itself shrinking directionally? and the time dilation effect could be due to the velocity of an object on the surface of the Earth through this shrinking space. Also the acceleration of a falling object due to gravity would merely be the object losing its upward momentum from when it was held in place? This would mean gravity(g-force) is merely inertia. The part that doesn't make sense in the this hypothesis is that the shrinking would need to be accelerating as an object that experiences g-force must be resisting acceleration.
 
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  • #2
Gomjabbar said:
can you think of gravity as space itself shrinking directionally?

If you mean specifically "gravity around a spherically symmetric massive object", as it seems you do from the rest of your post, then there is a model that works something like this. It's called the "river model" of black holes:

http://arxiv.org/abs/gr-qc/0411060

However, this model doesn't quite view space as "shrinking"; instead, it views space as flowing inward towards the massive object. (In the limiting case of a black hole, space flows inward all the way to the center at r = 0; inside the horizon at r = 2M, space is flowing inward faster than light.) You might try re-thinking the questions in the rest of your post in the light of this model.
 
  • #3
yeah I read over that and conceptually its the same thing as what I was thinking.
 

FAQ: Is Gravity Just Inertia in Disguise?

What is the concept of "Gravity is space shrinking"?

The concept of "Gravity is space shrinking" is a hypothesis proposed by some physicists that suggests that the force of gravity is caused by the shrinking of space rather than the presence of mass. This theory is still being debated and has not been proven.

How does this theory differ from the traditional understanding of gravity?

The traditional understanding of gravity is based on Newton's law of universal gravitation, which states that the force of gravity is directly proportional to the mass of two objects and inversely proportional to the square of the distance between them. The "Gravity is space shrinking" theory proposes that gravity is not a force between masses, but rather a result of the warping of space and time.

What evidence supports the idea of "Gravity is space shrinking"?

Currently, there is no definitive evidence that supports the theory of "Gravity is space shrinking". Some physicists have used theoretical models and mathematical equations to support this idea, while others argue that there is not enough empirical evidence to support it.

How does this theory relate to Einstein's theory of general relativity?

Einstein's theory of general relativity is based on the concept of gravity as the curvature of space and time caused by mass. The theory of "Gravity is space shrinking" is an attempt to reconcile this idea with quantum mechanics, which describes the behavior of particles on a very small scale.

Is there any practical application of this theory?

At this time, there are no known practical applications of the theory of "Gravity is space shrinking". However, if this theory is proven to be true, it could potentially lead to a better understanding of the fundamental laws of the universe and potentially lead to new technologies and advancements in the future.

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