“2021年IOAA理论第3题-火星”的版本间的差异
来自astro-init
Jingsong Guo(讨论 | 贡献) (创建页面,内容为“==英文题目== ==中文翻译== ==解答==”) |
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==英文题目== | ==英文题目== | ||
+ | A spacecraft of mass m=5.0\times 10^{4} kg 𝑔 approaches in a parabolic orbit 𝐴𝐵, with respect to Mars. When the spacecraft reaches point 𝐵 of least distance to the center of Mars,r_{B} =6.8\times 10^{6} m, it undergoes an instantaneous deceleration using its rockets and goes into a perfectly calculated orbit so that it will touch the Martian surface exactly at point 𝐶, diametrically opposite 𝐵, as shown in the figure. | ||
==中文翻译== | ==中文翻译== | ||
==解答== | ==解答== |
2022年10月4日 (二) 22:10的版本
英文题目
A spacecraft of mass m=5.0\times 10^{4} kg 𝑔 approaches in a parabolic orbit 𝐴𝐵, with respect to Mars. When the spacecraft reaches point 𝐵 of least distance to the center of Mars,r_{B} =6.8\times 10^{6} m, it undergoes an instantaneous deceleration using its rockets and goes into a perfectly calculated orbit so that it will touch the Martian surface exactly at point 𝐶, diametrically opposite 𝐵, as shown in the figure.