题目内容
我国自主研发的北斗导航系统(BDS)又被称为“双星定位系统”,具有导航、定位等功能。北斗系统中有两颗工作卫星均绕地心O做匀速圆周运动,轨道半径为r,某时刻两颗工作卫星分别位于轨道上的A、B两位置如图所示。若卫星均顺时针运行,地球表面处的重力加速度为g,地球半径为R,不计卫星间的相互作用力。以下判断中正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045407823435.jpg)
A.这两颗卫星的加速度大小相等,均为![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540813570.png)
B.卫星1由位置A运动至位置B所需的时间为![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540829739.png)
C.卫星1向后喷气就一定能追上卫星2
D.卫星1要追上卫星2其轨道半径要先增大再减小
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045407823435.jpg)
A.这两颗卫星的加速度大小相等,均为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540813570.png)
B.卫星1由位置A运动至位置B所需的时间为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540829739.png)
C.卫星1向后喷气就一定能追上卫星2
D.卫星1要追上卫星2其轨道半径要先增大再减小
AB
试题分析:根据牛顿第二定律
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540844848.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540860684.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540891649.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045409071088.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540922920.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004540954979.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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