Feb 1, 2009 #1 A Ally Member Joined May 17, 2008 Messages 406 Reaction score 0 Points 16 T = 125 min = 125(60) = 7500 s R = 6.38E6 m m = 5.97E24 kg G = 6.673E-11 I tried using the equation T = 2(3.14)sqr.d^3/Gm, but my answer seems to be a thousand off every time.
T = 125 min = 125(60) = 7500 s R = 6.38E6 m m = 5.97E24 kg G = 6.673E-11 I tried using the equation T = 2(3.14)sqr.d^3/Gm, but my answer seems to be a thousand off every time.
Feb 1, 2009 #2 D DananJ New member Joined Feb 1, 2009 Messages 1 Reaction score 0 Points 1 mrw^2 = GmM/r^2 Leads to w^2 r^3 = GM (2pi /T) ^2 r^3 = GM 4pi^2 r^3 = GM T^2 r^3 = GM T^2 / 4pi^2 Work out r^3 then r. Since r = radius R of Earth + height above urface,h h = r - R Good luck.
mrw^2 = GmM/r^2 Leads to w^2 r^3 = GM (2pi /T) ^2 r^3 = GM 4pi^2 r^3 = GM T^2 r^3 = GM T^2 / 4pi^2 Work out r^3 then r. Since r = radius R of Earth + height above urface,h h = r - R Good luck.