Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [acceleration]

Questions regarding the measurement for change if velocity per unit of time.

1
vote
2answers
92 views

Ion thrusters trip time

Suppose we had a fully equipped nuclear powered ion thruster starship. If it had a constant rate of acceleration of 1g, taking into account the fact that at the half way point you would have to turn ...
1
vote
0answers
86 views

How long will it take me to get to Mars?

I am a spaceship travelling from Jupiter under constant acceleration of 1g (9.8meters/sec2) provided by fusion drive to Mars. I departed at exactly the same time as an identical ship, travelling the ...
4
votes
3answers
185 views

Orbital Railgun for launching deep space probes

I've perused some of the articles and questions on magnetic acceleration using rail guns and they all seem to say that it's possible just not practical. I wanted to know what are the drawbacks to ...
2
votes
2answers
366 views

Outgassing as a viable explanation of Oumuamua acceleration excess

A recent paper on Oumuamua claims the following: 'Oumuamua (1I/2017 U1) is the first object of interstellar origin observed in the Solar system. Recently, Micheli et al. (2018) reported that '...
2
votes
0answers
47 views

What forces and motion would astronauts experience in a spacecraft in Earth-Moon L1 & L2 Lissajous orbit?

What is the maximum velocity they would experience? Would they be aware of the movement based on the positions of the Earth, Moon, or stars, or would it be too slow to notice? Would they feel any G ...
0
votes
1answer
71 views

What could possibly happen if an object accelerates 9.81 m/s^2 upwards if it started from the ground ? [closed]

Will the acceleration of the object and the acceleration due to gravity cancel each other and that object remains at the same space coordinate?
2
votes
1answer
150 views

Is there an optimal accelaration for first stage going in LEO?

I know every engineering works is based on compromises, and rocket design is no exception. A rocket should go as quickly as possible to high altitude to avoid flying for a long time and at high speed ...
4
votes
2answers
503 views

How do I calculate a rockets burn time from required velocity?

Say my rocket could produce F newtons of thrust while consuming M1 kilograms of fuel per second. It's mass at start is M0, and it keeps burning until it reaches V velocity. How would I find out the ...
0
votes
1answer
70 views

Gravitational forces affecting acceleration on a space ship with artificial gravity [closed]

I and my brother are having an argument on gravity on a space ship. For this argument lets say, you are in a void. There are no outside gravity forces, ie planets or solar systems in the near region. ...
2
votes
2answers
313 views

What is a non-propulsive vent?

I just hear the term "non-propulsive vent". Is it a thing, a vent that does not cause propulsion? Or is it an event, where a vent of some unwanted gas has occurred which did not result in a ...
12
votes
2answers
1k views

How much acceleration g-force can prevent pilot from moving their arms?

Assuming that the craft’s engine is capable of any amount of acceleration, how much g-force would prevent the pilot from being able to move their limbs in order to control the space craft? There is ...
4
votes
1answer
884 views

Theoretical Max G forces on Shuttle Launch?

Reading this question Why are rocket engines operating above 100% often considered nominal? leads me to a question about throttling back the SSMEs in the later stages of a Shuttle Launch to limit G ...
5
votes
1answer
165 views

Soyuz seat - return

Every astronaut launching on a Soyuz has a seat custom-made (source). However, I don't believe astronauts typically return on their original Soyuz, and I know that they don't always. In this case, are ...
12
votes
2answers
4k views

SpaceX rocket strange velocity

In SpaceX launch on May 1st, 2017, we get to see the full flight path of the first stage rocket of the falcon 9 from launch to land: It accelerates to around 1685m/s ...
9
votes
1answer
370 views

Challenging Karman line from above

Maybe I should ask this in Aviation SE, but let's try it here first, since initial conditions of the thought experiment is (very) LEO / reentry. Capsules and mostly space shuttle, generate lift in ...
4
votes
1answer
217 views

Why does not the ISS turn when accelerating?

When spasecraft accelerates its center of masses should be on the line of force vector otherwise it will start to spin. How does ISS hold its orientation when accelerating? Do gyros hold station ...
5
votes
1answer
275 views

On determining nominal speed of reaction wheel

As part of a project, I am designing a reaction wheel system for a nano-satellite. I am now researching on how to determine the nominal speed of the reaction wheel. I have characterized the deadzone ...
1
vote
3answers
279 views

Is it possible, using known acceleration laws, to drastically lower force required to leave Earth's Gravitational pull?

Just a silly theory to illustrate my question. If we were to build a globe (or a detached runway, could be any structure really as long as it goes around earth and meets on both ends) around the earth,...
3
votes
3answers
705 views

Amount of fuel for accelerating a spaceship

Suppose I have a spaceship and fire up its engines, accelerating to 10000 km / h. Now I turn off my engine and see I have consumed 10 % of my fuel (90 % left). How much fuel does it take to ...
12
votes
2answers
537 views

Are we actually that close to techniques of accelerating probes to speeds like a quarter $c$?

As recent research has been started by a team around Stephen Hawking under the name Breakthrough Starshot they are going for accelerating little probes up to 0.2~0.25$c$. There isn't that much ...