All Questions
Tagged with newtonian-gravity potential
9
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How to calculate eccentricity of a planet via energy?
The relative distance of a planet moving around the sun is found to be:
$$r(\varphi) = \dfrac{\kappa}{1+\varepsilon\,\cos(\varphi)} \quad \text{where} \quad \kappa = \dfrac{L^2}{G\,{m_p}^2\,m_s} \quad ...
- 462
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1
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Why is general relativity in (2+1) dimensions different from cylindrical systems in (3+1) dimensional GR?
The gravitational potential $\Phi$ of an infinite rod in newtonian gravity is $\Phi \sim \ln(r)$. This is the same as the gravitational potential of a point charge in two-dimensional Newtonian gravity ...
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What is the physical reason for why gravitational potential (or electrical potential) due to two masses at a point can simply be added algebraically?
The simple explanation that textbooks and the internet say is that "gravitional potential is a scalar quantity hence can be added algebraically".
However, I'm not sure if it is that simple. Take for ...
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Potential at Center of Earth
If using the surface of the earth as a reference point how much work is needed for gravity to pull me to the center. Is it negative infinity or am I wrong? Also is a single value of potential ...
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General potential of rotating system
I'm new here at the physics site, and not really that deep into the area of which i'm going to ask a question about now.
Therefore please feel free to ask clarifying questions.
I'm trying to deal ...
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2
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1
answer
365
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Gravitational potential energy defined as the work done on a mass
Our physics sir made us write that gravitational potential energy is the work done in bringing a mass from infinity to a point without acceleration, but I am confused because if acceleration is $0$ it ...
- 1,200
1
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Retarded potential fields and gravity simulations?
Dear physics stack exchange,
I've been trying to consider exactly how to program a gravitational simulation with time-retarded gravitational potential fields. Its proven difficult given each time one ...
0
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3
answers
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Defining gravitational potential
I recently came across the definition of gravitational potential where .....
Suppose a particle of mass $m$ is taken from a point $A$ to $B$. Let $U(A)$ and $U(B)$ denote the gravitational ...
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Acceleration due to gravity: what's the derivation? [closed]
Modelling the Earth as a symmetric, spherical body (and by using the law of gravitation), we come up with the equation
$$w = F_g = \frac{Gm_Em}{R_E^2}$$
How do we arrive to the equation to get the ...
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