All Questions
Tagged with gravity reference-frames
103
questions
8
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2
answers
569
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Mach's principle and a reference frame for acceleration
Although there are different statements of Mach's principle, one statement could be that acceleration is meaningless unless it can be defined relative to something. The distance stars provide a fixed ...
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2
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757
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Is it possible to generate artificial gravity without using a centrifuge system?
I was doing research on General Relativity and Einstein's field equations and pondered on a device using that would generate artificial gravity without the use of rotational forces. I wondered since ...
1
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3
answers
115
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Newtonian physics and equivalence principle: a doubt on acceleration and gravity
First of all, the famous Einstein's elevator experiment is quite clear in my head, both of versions.
But now, consider the following:
Suppose then you wake up inside a car that is traveling in ...
20
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14
answers
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Why don't you feel gravity the same way you feel a car's acceleration? [closed]
If you are in an accelerating car or spaceship you feel an apparent force pushing you backwards, which as I understand is due to your own body's inertia (it wants to keep its current velocity but the ...
- 317
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1
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191
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Is inertia still considered a mysterious force?
When I first saw, for example, weightless objects in a space capsule, I assumed that pushing them would require no effort because, of course, they did not weigh anything. On Earth, heavy objects are ...
- 2,238
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1
answer
69
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Conditions for Schwarzschild Metric to be applicable
The Wikipedia article regarding the two-body problem in General Relativity states that the Schwarzschild metric "corresponds to the external gravitational field of a stationary, uncharged, non-...
- 2,712
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1
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108
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Are there different types of gravitational forces based on different types of masses ( inertial or relative etc)
There are different types of masses like inertial mass, passive gravitational mass, active gravitational mass, relative mass, et cetera. does Are there different types of gravitational forces that is ...
- 33
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2
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113
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Nature of gravitation field
In many books, a truth of gravitation field has been stated in the following way: "No matter what mass does matter have, all objects will follow exactly the same trajectory under the action done ...
- 377
1
vote
1
answer
295
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How can we explain the infinite time period of a simple pendulum in an artificial satellite from ground's frame of reference?
If we sit in the satellite's frame of reference(which is non-inertial because the satellite is accelerating) the pendulum's bob will feel a pseudo force just opposite to the gravitational force being ...
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2
votes
2
answers
192
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Effect of velocity on gravitational force
If I am aboard a spacecraft and have with me two identical metal spheres having rest mass $= m$, what happens to the gravitational force between these two spheres as the space craft velocity ...
0
votes
1
answer
104
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A problem regarding light bending
My professor in his lectures has stated that a consequence of Einstein Equivalence Principle (EEP) alone is that light bends in a gravitational field.
The proof went as follow: Imagine to be a free ...
- 4,577
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votes
1
answer
93
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Non-existence of Lorentz frame at rest on Earth
So, I was reading Schutz First Course in General Relativity and in chapter 5 is states that " If SR is to be valid in a gravitational field, it is natural guess to assume that laboratory frame at ...
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13
votes
6
answers
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Is spacetime curved in a near-earth-free-falling-object's frame of reference?
If I float motionless in outer space, I will measure spacetime to be approximately flat.
By the equivalence principle, I will get flat spacetime if I am free falling near earth.
Is this right? ...
- 131
1
vote
1
answer
110
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Strong gravitational field equivalent to accelerated frame
I have recently learned about the equivalence principle and what it says is that( If I have understood it properly) the trajectory of the particles will be the same irrespective of the properties of ...
- 135
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0
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92
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What is centrifugal force relative to? [duplicate]
Edit- the answer is mach's principle and mach's principle is sketchy so there is no good answer.
So I understand that centrifugal force is really just inertia and stuff but I still have a question.
...
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