# Release speed

General scientific debates. Presentations of new technologies (not directly related to renewable energies or biofuels or other themes developed in other sub-sectors) forums).
ABC2019
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Registration: 29/12/19, 11:58
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## Re: Release speed

dede2002 wrote:In fact the formula is very simple:
To calculate the takeoff speed it is v = root of r * g

I don't know what you call "take-off" speed (I think you've already seen a lot of planes take off with a much slower speed)
what you are calculating there is the speed of orbiting in fact (that of a circular orbit).

But I don't know how to explain the "2" ...

there is a theoretical explanation based on the virial theorem ...

https://fr.wikipedia.org/wiki/Théorème_du_viriel

in fact it comes from the fact that the potential energy is in r ^ (- 1} (i.e. in 1 / r and that 2 is 1 +1 . (ie if the gravitation was in "r ^ (- n)" or 1 / r ^ n we would have a factor n + 1 between the two).
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dede2002
Grand Econologue
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## Re: Release speed

Thank you, in any case it's a complex formula.
1870 is relatively recent, we had already invented pencil and paper ...
When does the formula for the rate of release date?
And that of centrifugal force?
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ABC2019
Econologue expert
posts: 12927
Registration: 29/12/19, 11:58
x 1007

## Re: Release speed

dede2002 wrote:Thank you, in any case it's a complex formula.
1870 is relatively recent, we had already invented pencil and paper ...
When does the formula for the rate of release date?
And that of centrifugal force?

of Newton, in the XNUMXth century, it's not new
0 x
To pass for an idiot in the eyes of a fool is a gourmet pleasure. (Georges COURTELINE)

Mééé denies nui went to parties with 200 people and was not even sick moiiiiiii (Guignol des bois)

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