■解答
① \(\displaystyle\frac{1}{2}mv_0^2\) ② \(-G\displaystyle\frac{Mm}{2R}\) ③ \(-G\displaystyle\frac{Mm}{3R}\)
④ \(\sqrt{\displaystyle\frac{GM}{3R}}\) ⑤ \(m_0\displaystyle\frac{v^2}{3R}\) ⑥ \(G\displaystyle\frac{Mm_0}{9R^2}\)
⑦ \(\sqrt{\displaystyle\frac{GM}{3R}}\) ⑧ \(\displaystyle\frac{6\pi R}{v}\) ⑨ \(\displaystyle\frac{1}{3}\)
⑩ \(\sqrt{\displaystyle\frac{GM}{2R}}\) ⑪ \(6R\) ⑫ \(2\sqrt{2}\)
