All Questions
Tagged with newtonian-gravity projectile
13
questions with no upvoted or accepted answers
2
votes
1
answer
113
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How far apart are two initially $1000m$ separated bodies that fall to earth from infinity, when the closest body reaches earth?
Imagine two bodies (very, very small compared to the size of the earth), 1(km) separated from each other (in the direction of the earth) at infinity. After they reach earth after an infinite long trip ...
2
votes
1
answer
170
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Determine initial velocity of an object which was thrown (WITH air resistance)
I have the following problem: I want to determine the initial velocity of an object which is for example dropped from a moving plane. I know the position, from where the object is dropped and I know ...
- 29
2
votes
1
answer
81
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Satellite and gravitational acceleration
According to $0.5gt^2$ object will fall 5m in first second.
Earth curve is 5m for 8km
So if we can project object at 8000 m/s speed object will never fall into ground.
Above scenario is correct for ...
- 29
1
vote
1
answer
109
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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 ...
1
vote
1
answer
115
views
Finding the angle that gives longest path for projectile motion using the average speed over the vertical displacement of object
For projectile motion, let's say a ball is launched at an angle a with respect to the horizontal, upwards.
If I want to find an expression for the length of the path travelled by the ball before it ...
- 45
0
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answers
52
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Rocket equation non-constant gravity
I am currently trying to teach myself differential equations and wondered about the following problem.
You have an object (a rocket of constant mass $m_r$) and initial velocity $v_0$ that tries to ...
- 253
0
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0
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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 $v_x^2=2GM(\frac{1}{r_x}-\...
- 91
0
votes
1
answer
41
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Does it takes more or less effort to dribble in a micro-$g$ environment?
Imagine an astronaut is practicing with a standard official basketball on an orbiting space station. Assume everything is in free fall so I wonder would it consume less or more effort to dribble ...
- 13k
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votes
1
answer
39
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Air Friction Newton III
I have question to the Newton III Law and Air Friction.
At the free Fall of a Body there is an Air Friction, which is in oppopsite direction to the Gravitation Force. In my opinion the Body pushes to ...
- 1
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
98
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Is gravitational force different from centripetal force in projectile motion?
This has always confused me, in a projectile motion, like a cannon shooting an object, the only force acting on the body is gravitational force, which is facing downwards or more precisely, ...
- 63
0
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0
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300
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Varying Gravity and Air Resistance in projectile motion
Salutations, I have been trying to approach a case about projectile motion considering variation of gravity acceleration and air resistance:
A spherical baseball with mass "m" is hit with inclination ...
- 141
-1
votes
1
answer
83
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Moving objects released
There is a balloon moving upwards with a small object attached to its bottom. If the object is released after some time, then will it start moving downwards suddenly, or will it move up a little with ...
- 1