设该星球的质量为M,物体的质量为m,星球的半径为R：根据地表重力为g1,万有引力充当重力.GMm/r^2=g1.(1)地面h处GMm/(r+h)^2=g2.(2)用(1)除与（2）(r+h)^2/r^2=g2/g1最后得到r=h(g2)^(1/2)/[(g1)^(1/2)-(g2)^(1/2)]没公...