G-Force Measurement: Formulas for Launching into Orbit

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SUMMARY

The discussion centers on g-force measurement during satellite launches into orbit. It establishes that 1 G is equivalent to 9.8 m/s² at Earth's surface, with g-forces increasing to approximately 3-5 G during launch depending on the acceleration. The conversation highlights that astronauts experience about 2 G when the rocket accelerates at around 20 m/s², while a more accurate upward acceleration is around 30 m/s². For orbital conditions, the g-force approaches 0 G.

PREREQUISITES
  • Understanding of basic physics concepts, particularly acceleration and force.
  • Familiarity with g-force measurement and its implications in space travel.
  • Knowledge of the relationship between acceleration and gravitational force.
  • Basic understanding of orbital mechanics and satellite launches.
NEXT STEPS
  • Research the formula for calculating g-force, particularly in the context of rocket launches.
  • Study the effects of different acceleration rates on astronauts during launch.
  • Learn about the physics of orbital mechanics and how g-forces change in space.
  • Examine case studies of various rocket launches to analyze g-force profiles.
USEFUL FOR

Aerospace engineers, physicists, students studying space travel, and anyone interested in the dynamics of rocket launches and g-force effects on astronauts.

Sword7
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Hello folks,

Does anyone know any formula about g-force measurement when launching into orbit? For example, 1 G at ground, 3-5 G during launching, 0 G at orbit.

Thanks,
Tim
 
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Hi,
I don't think there's a general formula. For example it could be say "500 G" for a little time (launching time) and then you could put the satellite into orbit.
It could also be accelerated very slowly, so G wouldn't get higher than "2 G" during its trip from Earth's ground to Earth's orbit.
But in any case you need to accelerate the satellite more than g (that is, around 9.8m/s^2).
 
Sword7 said:
Hello folks,

Does anyone know any formula about g-force measurement when launching into orbit? For example, 1 G at ground, 3-5 G during launching, 0 G at orbit.

Thanks,
Tim

One G equals to 9.8m/s2. You have 1 G at the surface of the Earth as well. So before launching, the g-force is 1 G (just like you and me have). At the launch, if the acceleration is ~20m/s2 so the astronauts bear about 3 G , and so on. In orbit, the g-force is almost zero and you have O G.
 
pixel01 said:
One G equals to 9.8m/s2. You have 1 G at the surface of the Earth as well. So before launching, the g-force is 1 G (just like you and me have). At the launch, if the acceleration is ~20m/s2 so the astronauts bear about 3 G , and so on. In orbit, the g-force is almost zero and you have O G.

Are you sure pixel, that if the acceleration is about 20m/s^2 then the astronauts bears 3 G?
I wouldn't say so. For me it's about 2 G. Even if the force required to do so has to "cancel out" the "1 G" acceleration we feel on Earth's ground and then has to propulse the astronauts to an acceleration of 20 m/s^2.
 
Pixel is correct. Relative to a free-falling reference frame, that rocket is accelerating upward at about 30 m/s^2, not 20.
 
D H said:
Pixel is correct. Relative to a free-falling reference frame, that rocket is accelerating upward at about 30 m/s^2, not 20.

Ok then I'm wrong.
I get it now!
 
Hello folks,

I found equation for g-force when I searched through google. Look at http://en.wikipedia.org/wiki/G-force" about equation of g-force for calculation.

Tim
 
Last edited by a moderator:

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