Radio interferometry is a technique for studying details of celestial objects that combines signals intercepted by widely spaced radio telescopes. This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs. The successful interferometric linking of an Earth-based radio telescope with a radio telescope on an orbiting satellite was therefore a significant technological accomplishment.
Which of the following can be correctly inferred from the statements above

A．Special care was taken in the launching of the satellite so the calculations of its orbit would be facilitated.

B．The signals received on the satellite are per than those received by a terrestrial telescope.

C．The resolution of detail achieved by the satellite-Earth interferometer system is inferior to that achieved by exclusively terrestrial systems.

D．The computer programs required for making use of the signals received by the satellite required a long time for development.

E．(E) The location of an orbiting satellite relative to locations on Earth can be well enough known for interferometric purposes.

图1所示为一根竖直悬挂的不可伸长的轻绳，下端栓一小物块A，上端固定在C点且与一能测量绳的拉力的测力传感器相连．已知有一质量为m₀的子弹B沿水平方向以速度v₀射入A内（未穿透），接着两者一起绕C点在竖直面内做圆周运动．在各种阻力都可忽略的条件下测力传感器测得绳的拉力F随时间t的变化关系如图2所示．已知子弹射入的时间极短，且图2中t=0为A、B开始以相同速度运动的时刻．根据力学规律和题中（包括图）提供的信息，对反映悬挂系统本身性质的物理量（例如A的质量）及A、B一起运动过程中的守恒量，你能求得哪些定量的结果？