题目内容
从地球上发射两颗人造地球卫星A和B,绕地球做匀速圆周运动的半径之比为RA:RB=4:1,则它们的线速度之比
和运动周期之比TA:TB为( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250234418.png)
A.2:1,1:16 | B.1:2,8:1 | C.1:2,1:8 | D.2:1,2:1 |
B
试题分析:卫星做匀速圆周运动,万有引力提供向心力,则FA=G
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250265742.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250281535.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250297744.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250312538.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250328906.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250343561.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003250359944.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.2:1,1:16 | B.1:2,8:1 | C.1:2,1:8 | D.2:1,2:1 |