题目内容
如图所示是发射同步卫星的原理:先将卫星送入近地圆轨道Ⅰ,在近地点A加速使卫星沿椭圆轨道Ⅱ运动,在远地点B再一次加速使卫星进入圆形同步轨道Ⅲ运动。设地球半径为R,地球表面附近重力加速度为g0。下列判断正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250052540422929.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250052540422929.jpg)
A.卫星在轨道Ⅲ上运动的速率大于在轨道Ⅰ上运动的速率 |
B.卫星在轨道Ⅰ上的运动速率约为![]() |
C.卫星沿椭圆轨道Ⅱ运动时,在B点的速率小于在A点的速率 |
D.卫星沿椭圆轨道Ⅱ运动时,在B点的加速度大于在A点的加速度 |
BC
试题分析:根据公式
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005254073902.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005254088787.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005254104761.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005254057507.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005254135848.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005254151735.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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