题目内容
2012年6月24日,航天员刘旺手动控制“神舟九号”飞船完成与“天宫一号”的交会对接,形成组合体绕地球圆周运动,速率为v,。轨道高度为340 km。“神舟九号”飞船连同三位宇航员的总质量为m,而测控通信由两颗在地球同步轨道运行的“天链一号”中继卫星、陆基测控站、测量船以及北京飞控中心完成。下列描述正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517490599469.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517490599469.png)
A.组合体圆周运动的周期约1.5 h |
B.组合体圆周运动的线速度约7.8 km/s |
C.组合体圆周运动的角速度比“天链一号”中继卫星的角速度大 |
D.发射“神舟九号”飞船所需能量是![]() |
ABC
试题分析:由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517491831210.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517492931230.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749371779.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749527639.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749605654.png)
B对;由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517497291443.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517492931230.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749995317.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517501191046.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749527639.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749605654.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151750603619.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151749137590.png)
点评:本题学生清楚组合体绕地球运动时是万有引力提供向心力,然后用相应物理量的向心力公式去求解问题。
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目