题目内容
2011年11月3日,“神州八号”飞船与“天宫一号”目标飞行器成功实施了首次交会对接。任务完成后“天宫一号”经变轨升到更高的轨道,等待与“神州九号”第二次交会对接.变轨前和变轨完成后“天宫一号”的运行轨道均可视为圆轨道,对应的轨道半径分别为
、
,对应的角速度和向心加速度分别为
、
和
、
,则有( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509666327.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509682361.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509698359.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509729391.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509744315.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509760344.png)
A.![]() |
B.![]() |
C.变轨后的“天宫一号”比变轨前动能增大了,机械能增加了 |
D.在正常运行的“天宫一号”内,体重计、弹簧测力计、天平都不能使用了 |
B
试题分析:对绕地球运行的卫星,由万有引力提供圆周运动的向心力有:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250015098221208.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250015098541361.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250015098691115.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509885742.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001509916457.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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