All Questions
31
questions
2
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1
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43
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Trajectories of projectile based on different speeds of projection [duplicate]
So my teacher was teaching gravitation and an interesting fact that he mentioned was the trajectory of a projectile projected from Earth at a speed equal to escape velocity, is parabolic.
Also, he ...
- 21
2
votes
3
answers
50
views
Constant speed (at terminal velocity) and zero $g$
I have read the question What would a person experience in a free-falling elevator in a shaft long enough to reach terminal velocity? here and the answer was that you feel exactly the same if the ...
- 129
1
vote
1
answer
109
views
Projectile of an object thrown from rotating planet
Last night I couldn't sleep for some time because of thinking this problem. The starting point of this problem was actually "If we were to jump perfectly vertically on earth, would we land on the ...
0
votes
0
answers
48
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Problem on orbital motion
Let's say an object is thrown from Earth with a speed of v at an angle $\theta$. An ellipse is formed with the center of Earth as its foci(given in the figure).
We know that $v_x^2=2GM(\frac{1}{r_x}-\...
- 91
1
vote
3
answers
78
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What are the conditions that produce various shapes in 2D motion?
I have read that projectile motion is parabolic in nature. I know that the equation of projectile motion represents a parabola. But when do we get a parabolic curve? Does it happen when there is ...
0
votes
2
answers
98
views
How to calculate the trajectory of a high speed projectile on earth?
Let’s say you launch a high velocity ($2-8km/s$) projectile from the earth at the equator. How do you calculate the trajectory of the projectile in the absence of drag? Is there a simple formula that ...
- 2,908
0
votes
0
answers
51
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How to calculate the gravitational field from trajectories?
I have a question about numerical simulation. At first I was pretty sure that It should exist some well-established state of the art techniques to solve it, but It seems I don't have the exact ...
- 1
0
votes
1
answer
46
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Generalized projectile motion [closed]
Toss an object from the surface of earth at speed $V_1=\sqrt{MG/R}$. Here $R$ is the radius of the earth and $M$ is the mass of the earth and $G$ is universal gravitational constant. How long will it ...
- 147
2
votes
2
answers
276
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How do i calculate a projectile range accounting for a planet's curvature?
I was trying to solve this problem myself but i dont know how to work out certain variables like gravity, centripetal force and the changing impact point due to the curve of a planet (any planet).
So ...
- 57
1
vote
3
answers
158
views
Calculating where dropping a lead ball from orbit would land, if dropped perpendicular to the Earth, under very simplified conditions
This question has a lot of "what if"s, so let's simplify this:
Assume Earth is perfectly spherical
Assume no wind or anything, just plain atmosphere that is generally uniform (but will ...
- 185
1
vote
2
answers
244
views
Flat Earth interpretation of Newtonian gravity [closed]
Consider a projectile body launched from the earth's surface with a speed lower than the escape velocity.
The orbit of the body under Newtonian gravity traces an ellipse which intersects with the ...
- 2,402
1
vote
4
answers
703
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Why does the vertical velocity of a projectile launched horizontally, close to the surface of the Earth, not change? [closed]
I cannot find an answer to this question and every time I come close, I am lost again. This is a fairly amateur question.
I am assuming if a projectile is launched horizontally, from say Newton's ...
- 137
2
votes
3
answers
523
views
Why is a projectile trajectory parabolic while that of a satellite elliptic?
I understand that the parabolic trajectory is an approximation of a more elliptical trajectory, since acceleration due to gravity is taken to be a constant for a projectile. However I'm intrigued to ...
- 122
0
votes
1
answer
673
views
Minimum Velocity for a projectile to leave the Earth
Let's say we have a cannonball that can shoot at various angles. How would we find the minimum velocity for this projectile to leave the Earth when the cannonball is shot at an angle $\theta$. I think ...
- 3
18
votes
7
answers
7k
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Why does the Earth follow an elliptical trajectory rather than a parabolic one?
I was taught that when the acceleration experienced by a body is constant, that body follows a parabolic curve. This seems logical because constant acceleration means velocity that is linear and ...
- 301