题目内容
有两颗人造地球卫星a、b在如图所示的轨道上做匀速圆周运动,下列说法中正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011152763791.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011152763791.jpg)
A.a的周期比b大 |
B.a的向心加速比b大 |
C.a的向心力比b大 |
D.a的角速度比b大 |
A
试题分析:卫星与地球间的万有引力提供向心力,有:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011154011091.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115416981.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115416459.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115432511.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115448848.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115463721.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115479872.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115510337.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115526928.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115604831.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001115619523.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.a的周期比b大 |
B.a的向心加速比b大 |
C.a的向心力比b大 |
D.a的角速度比b大 |