题目内容
如图所示,发射地球同步卫星时,先将卫星发射至近地圆轨道1,然后经点火,使其沿椭圆轨道2运行,最后再次点火,将卫星送入同步圆轨道3,轨道1和2相切于Q点,轨道2和3相切于P点,设卫星在1轨道和3轨道正常运行的速度和加速度分别为v1、v3和a1、a3,在2轨道经过P点时的速度和加速度为v2和a2,且当卫星分别在1、2、3轨道上正常运行时周期分别为T1、T2、T3,以下说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241528013754162.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241528013754162.jpg)
A.v1 > v3> v2 | B.v1> v2 > v3 |
C.a1 >a2 > a3 | D.T1 < T2 < T3 |
AD
试题分析:卫星绕地球做匀速圆周运动,万有引力提供向心力,由圆周运动规律比较线速度、角速度、周期和加速度的关系。
AB、卫星绕地球做匀速圆周运动,万有引力提供向心力,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152801469902.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152801609694.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152802062417.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152802202441.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241528022801005.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241528023421001.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152802717419.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803154455.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803200523.png)
C、由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803450848.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803575720.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803793500.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803856526.png)
D、由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241528039181088.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152803996981.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152804105492.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152804230532.png)
故选AD
点评:卫星绕地球做圆周运动,万有引力提供向心力,由,由轨道半径关系和圆周运动规律比较线速度、角速度、周期和加速度的关系。
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目