G*m*M/(Rз+H)^2=m*a=m*v^2/(Rз+H) G*M/(Rз+H)^2=v^2/(Rз+H) G*M/(Rз+H)^2=(G*M/Rз^2) * (Rз^2/(Rз+H)^2) = g*Rз^2/(Rз+H)^2 v^2/(Rз+H) = g*Rз^2/(Rз+H)^2 v^2 = g*Rз^2/(Rз+H) v = корень(g*Rз^2/(Rз+H))=6400000*корень(9,8/(6400000+1700000)) м/с = 7039,641 м/с ~ 7040 м/с ~ 25 342 км/час