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Date: Mon, 28 Aug 2023 10:53:53 -0700 (PDT)
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Subject: Re: Petite question simple.
From: Richard Verret <rverret97@gmail.com>
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Le 28/08/2023 =C3=A0 14:48, Julien Arlandis a =C3=A9crit :
> Le 28/08/2023 =C3=A0 14:08, Richard Hachel a =C3=A9crit :
>> A noter que si l'on veut donner les additions de vitesses observables lo=
ngitudinales, =C3=A0 partie de l'=C3=A9quation g=C3=A9n=C3=A9rale des VO, e=
n posant cos=C2=B5=3D1 et sin=C2=B5=3D0, on a :
>> w=3Dv+u/(1+vu/c=C2=B2)
>> Et pour les transversales (cos=C2=B5=3D0 et sin=C2=B5=3D1) : w=3Dsqrt(v=
=C2=B2+u=C2=B2-v=C2=B2u=C2=B2/c=C2=B2)
>> Comme chacun le sait.
>> On peut faire la m=C3=AAme chose ici pour les vitesses r=C3=A9elles.
>>=20
>> On pose pour les longitudinales (cos=C2=B5=3D1, sin=C2=B5=3D0) et on a:
>> Wr=3DVr.sqrt(1+Ur=C2=B2/c=C2=B2) + Ur.sqrt(1+Vr=C2=B2/c=C2=B2)
>> et pour les transversales  (cos=C2=B5=3D0, sin=C2=B5=3D1)
>> Wr=3Dsqrt[Vr=C2=B2+Ur=C2=B2+Vr=C2=B2Ur=C2=B2/c=C2=B2]

> C'est quoi Ur, Vr ?
Ur et Vr sont les vitesses r=C3=A9elles, celles du monde r=C3=A9el qui est =
diff=C3=A9rent du monde perceptible (observable).
> En relativit=C3=A9 il n'y a qu'une seule vitesse not=C3=A9e u et v.
u et v =C3=A7a fait deux vitesses, pas une.