All Questions
23
questions
0
votes
1
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121
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Which gravitational differences we would feel if the sun disappeared?
I would like to start by stating that I'm not a physicist, I'm purely a curious individual.
I've been speculating about the differences the loss of the sun's gravitational field would have on us and ...
- 247
2
votes
1
answer
72
views
Will a man acquire orbit if we suppose Earth is rotating fast enough?
if we consider that the rotation of earth is mush faster (30000km/h), so if a man standing on earth jumps 1 meter above will it acquire orbit if we ignore atmospheric friction
- 21
0
votes
1
answer
216
views
Would the moon eventually hit the Earth?
The moon is rotating around the earth in elliptic or approximately circular orbit with speed $v$. Its acceleration have two components tangential and radial one. It is the radial acceleration ...
user230437
0
votes
2
answers
99
views
Question About Gravity vs. Earth’s Rotation [duplicate]
If a bullet was fired perfectly straight up (assuming a windless environment) such that the peak of its trajectory was just shy of orbit, would it fall back to Earth in the same spot, or would Earth’s ...
- 101
-1
votes
1
answer
87
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Gravitation question
I’d like to ask the following doubt that came to me after some exercises:
Is it possibile to exactly establish,given a satellite orbiting Earth with a certain $\vec v_{0}$ and distance $\vec R_{1}$ ...
- 101
0
votes
1
answer
178
views
Why is the gravitational pull equal on all sides of the Earth"?
I understand that the Earth moves through the solar system at an extremely fast rate, but a question occurred to me as I reflected on this piece of knowledge: Does the speed of the Earth traveling at ...
- 285
1
vote
4
answers
734
views
Does escape velocity require you to cross Moon's orbit?
Escape velocity is the velocity required to project an object from an object's (here, the Earth's) surface so that it "escapes" the gravity of that object (or in our case, the Earth's gravity). Now, ...
- 115
-1
votes
1
answer
40
views
Gravitational effect of larger solar system to Earth orbit
Let's say our solar system enters to gravitational area of a larger solar system. Does Earth's orbit of sun get affected from this case?
- 181
2
votes
2
answers
142
views
Do we weight a tiny bit less due to the orbit of the Earth around the Sun?
Of course the Earth is orbiting in a weightless state around the Sun so people on it too.
Now there could also be some tidal force of the Sun on the Earth, but are they realy caused by the orbit of ...
- 3,348
-3
votes
1
answer
2k
views
Why don't Moon collide with Earth but revolves due to gravity? [duplicate]
As we know gravitational force is a central force so due to gravitational effect they must collide with each other but why they revolve?
39
votes
7
answers
14k
views
Why don't we feel the subtle speed change of Earth's elliptical orbit?
Earth's orbit is a slight ellipse, so to conserve momentum its speed increases when it is closest to the Sun. If the speed changes there is an acceleration. If there is an acceleration there is a ...
- 2,878
1
vote
3
answers
329
views
Would a non-rotating Earth collapse on the Sun?
If the earth stopped rotating on its axis, would this influence its revolution motion? In particular, could it collapse on the sun? I ask this because on the one hand I thought the two degrees of ...
- 1,793
2
votes
2
answers
673
views
Moon Gravity Vs Earth Gravity Pull
Suppose, sometime in the future I develop an experimental superweapon capable of blowing up the entire Moon. If I used it to break the Moon into multiple pieces of varying sizes, we would then have ...
- 249
1
vote
1
answer
180
views
What is the outward force on the Moon that makes it go in orbit rather that falling straight to the Earth? [duplicate]
So, we know that the gravity is responsible for pulling the Moon towards the Earth. But because it moves in an orbit, it makes me think that there must be a force that is causing the moon to travel in ...
- 553
2
votes
1
answer
3k
views
Why doesn't the moon crash into the Earth? [duplicate]
I was searching about 'why do not moon crash to earth due to its gravity?'Then by reading physics stake exchange existing questions I came to know that its the sideways motion of the moon that keeps ...
