VI2=(GMz):Rz VII=2*GM/Rz = GM/Rz =11,2 km/s VIII=43 km/s
Wza→b=mg(h2-h1)= Ep Wza→b =m(Vb-Va) Wza→b=GMm(1/ra-1/rb)
a=(r1+r2)/2 (a13)/(a23)=(T12)/(T22) Epa=-GMm/ro Ep=mgh
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V1=s1/t V=Ep/m Fśr= fa*Fb=GMm/ra*rb γa=GM/r2a