1. The problem statement, all variables and given/known data Values for the grav potential due to the earth are given below: dist from earth's surface/m : grav potential/MJ kg-1 0 : -62.72 390 : -59.12 400 000 : -59.03 410 000 : -58.94 Infinity : 0 1. If a satellite of mass 700kg falls from a ht of 400 000m to the earth's surface, how much potential energy does it lose? 2. Deduce a value for the earth's grav field at a ht of 400 000m. 2. Relevant equations g=F/m grav potential, [tex]\phi[/tex]=Work done/mass =GMeMm/r 3. The attempt at a solution 1)I think I got out this part. Ep= m([tex]\Delta[/tex][tex]\phi[/tex]) =(-67.72--59.03)(700) =-6083J 2) G=gMM/r2 RE: [tex]\phi[/tex]= GM/r therefore, g=[tex]\phi[/tex]/r But this r=Re + height? And this is where I'm stumped.