All Questions
Tagged with newtonian-gravity gravity
404
questions
7
votes
2
answers
916
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Is Newton-Cartan theory really equivalent to Newton's theory of gravity?
It is often said that Newton-Cartan theory is a reformulation or perhaps a generalization of Newton's theory of gravity, and it is said that (given certain conditions/assumptions) the two theories are ...
- 8,640
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0
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33
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Does a particle which crosses the galaxy straight (not orbiting) suffer MOND's force in MOND theory?
Lets suppose a particle coming from intergalatic space crosses a galaxy. The particle is not rotating the galaxy, so it has no angular velocity or acceleration. The particle is attracted to the galaxy ...
- 476
1
vote
1
answer
39
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Does Global Warming play any significant role in increasing velocity of atmospheric gases?
I understand that moon does not have an atmosphere because it's escape velocity is low and atmosphere gases if it had would escaped into vacuum.
I know Earth has a relatively larger value of escape ...
5
votes
2
answers
140
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Current bounds on the value of $g$ for antimatter
In 2011, the ALPHA experiment showed that the gravitational acceleration for antihydrogen was between -65 and 110 times the normal gravitational acceleration. Has there been any improvement on the ...
- 756
2
votes
6
answers
804
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Is the gravitational force a phenomenon or a theoretical invention? [closed]
We use to say that gravitational force is a phenomenon. But since the theory of General Relativity replaced Newtonian gravitational force, how is it possible for a phenomenon to be replaced by a ...
0
votes
0
answers
29
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Will antimatter fall upward in a gravitational force field? [duplicate]
A positively charged particle has a force acting along the electric force field. The contrary is true for a negatively charged particle.
Can we apply the same analogy for antimatter and say that ...
2
votes
1
answer
337
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Cosmological constant term in Newtonian gravity [duplicate]
Recently, I came across something I found quite interesting on Wikipedia, which is the addition of the cosmological constant to Newtonian gravity. The Wikipedia page (Alternatives to General ...
- 687
1
vote
0
answers
91
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The Pioneer Anomaly - A simple interpretation of J.D. Anderson’s paper please
Although many believe the Pioneer anomaly was resolved by Slava Turyshev in 2012. He believed the altered position of P10 was due to the potential thermal recoil effect from the RTG’s (the small ...
- 719
4
votes
3
answers
471
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How does relativity explain Newton's apple? [duplicate]
You must have heard the anecdote about the apple falling on Newton's head that led him to come up with the concept of Gravity. A long time later, Einstein upgraded it to the General Theory of ...
- 91
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votes
1
answer
35
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Can the 0 Gravity of a hollow shell be rephrased to "If an object has a gravitational counterpoint net forces become 0"?
So the basic argument as I understand it for gravity inside a hollow shell is all gravitational forces are equal to 0, because they cancel out from the mass on the other side of the shell irrespective ...
- 87
-2
votes
1
answer
63
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What is the collective nature of gravity? [closed]
My understanding is that gravity is the interaction between all objects with mass. This applies to every single particle that has mass, regardless of size. We know that bodies with very large masses ...
- 725
2
votes
0
answers
107
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Would General Relativity work if gravity were not an inverse square law? [duplicate]
I understand that General Relativity explains gravity by framing it as a consequence of the curvature of spacetime rather than as a force. Does this theoretically guarantee that gravity must be an ...
- 21
0
votes
1
answer
76
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How do you find the distance between a massive object and its certain gravitational force?
Okay so I know I might've not phrased the question very well so I will give an example to try to make sense of it:
Say we have the moon and a place in space where the moon's gravitational force is 1,...
- 33
0
votes
6
answers
95
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Free falling bodies in the absence of external forces
We know that if two balls $B_{1}$ and $B_{2}$ having masses $m_{1}$ and $m_{2}$ respectively and suppose $m_{1}$ is sufficient greater than $m_{2}$. In daily life observation, we see that both the ...
- 27
0
votes
1
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86
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An object falling from very far would have varying acceleration, how can that be accounted for?
I want to have a function that describes where a falling object is.
Like this one:
h(t) = -g*t²/2
But this one is for the usual close to the surface case, where there is no variation of gravity due to ...
- 101