fg GMm r2 fg G 8 2 0042 fg G 8 2 0022 fg G 8 2 0022 fg G 8 2 0042 Fxy 0 Fy Fy Fgy Fsy Fy f3 costheta f5 costheta Fy 2 F3 cos theta 2 G 8 2 0022 costheta 46x106 N Fxy f5x f3x f1x Fxy F4cos40 f3sin40 f2sin40 f3cos10 Fxy cos theta Fx Fx f5x cos theta Fx f7 cos theta U GMm r2 dr U GMm r dr U GMm r2 1 1 C U GMm r U GMm r GMm U GMm r