All Questions
65
questions
2
votes
1
answer
76
views
How to properly combine kinetic and gravitational time dilation effect?
I developed a time dilation calculator that includes both kinetic (Lorentz Factor) and gravitational (Schwarzschild Metric Formula) factors to assess the time difference between Earth and satellites. ...
4
votes
2
answers
199
views
Is Hubbles law due to Gravity?
Hubble's law states that Distance is proportional to Velocity. A ScienceDirect article states that Classical Hubble expansion is characterized by a proportional increase in the rate of expansion ...
user348071
0
votes
2
answers
92
views
What causes things to gain the speed of nearby gravitational sources?
While I’m aware that this probably has a really simple answer, I can’t figure it out. For example, humans, apples, but also things outside of earth like the ISS travel along with the earth, at the ...
- 11
-1
votes
1
answer
37
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Which distance will the rocket fall at? [closed]
The first rocket in the world had a mass of 2 kg (without the charge). When the charge bursted, 200 g of explosive gases were thrown out at the speed of 600 meters per second.
Which distance will the ...
- 3
1
vote
1
answer
40
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Basic Gravity/Projectile Question
I have a really basic question before I start some code.
Can a projectile, launched into space, hit the opposite side of a planet with just its initial trajectory and force (assume an ideal, perfect ...
- 13
2
votes
2
answers
2k
views
How to calculate the direction of the velocity vector for a body that moving is on an elliptical orbit?
With circular orbits everything is simple. I just calculate the magnitude of the orbital velocity by $v = \sqrt{\frac u{\text{orbit Height}}}$ and then set the velocity vector as perpendicular to the ...
- 768
1
vote
1
answer
527
views
Does Earth's rotation affect the orbital velocity of its satellites?
We all know about the spin of black holes. That spin and of course it's gravity determines the minimum distance a star can orbit the black hole with a min orbital velocity.
Do we see similar result? ...
- 196
2
votes
2
answers
946
views
How to interpret line of sight velocity distributions and dispersions of a galaxy?
What I did: I am analysing some simulation snapshots of the Milky Way and it is modelled as a DM halo – bulge – disc system. I produced some mean line of sight velocity (LOSV) and dispersion of mean ...
- 63
5
votes
4
answers
898
views
Does movement of the earth bring difference in the distortion of fabric of spacetime?
The earth is constantly moving with huge velocity. Doesn't this tremendous velocity bring difference in distortion of spacetime at the opposite ends? I mean the end towards the direction of motion and ...
0
votes
2
answers
816
views
Why do two similar objects not hit the ground at different times?
The formula for air resistance is $$F_{air}=\frac{1}{2}\rho cAv^2 $$
where $\rho$ is the density of the air, $c$ is the drag coefficient, $A$ is the cross sectional area of the object and $v$ is the ...
- 246
2
votes
1
answer
623
views
Does maximum velocity change when vertical mass-spring system is used in different location on Earth in SHM?
Let me elaborate for you my concerning
I am thinking of a example of a vertical mass spring system. Suppose i place my system at equator, let suppose a wall clock which uses a vertical spring mass ...
- 486
0
votes
3
answers
741
views
What is the velocity of an object sitting on the surface of the Earth in General Relativity?
In General Relativity an object on the surface of the Earth feels a force from the Earth due to the surface of the Earth's constant acceleration through space or space-time.
From what I've heard time ...
- 639
0
votes
1
answer
357
views
Angular acceleration of ball when falling [duplicate]
Why is it assumed that angular acceleration is 0 when a ball is midair after rolling off a surface with constant velocity?
2
votes
1
answer
523
views
How can gravity be independent from velocity? [duplicate]
If gravity is directly related to mass, and mass increases as an object travels closer to light-speed, how can velocity not affect gravity?
- 29
5
votes
1
answer
704
views
Maximum Vertical Velocity of Pendulum
Say there is a 10N pendulum held parallel to the ground. In a frictionless environment, it will continue swinging along a semicircular path. The pendulum tip should have the highest horizontal ...
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