题目内容
随着我国登月计划的实施,我国宇航员登上月球已不是梦想;假如我国宇航员登上月球并在月球表面附近以初速度v0竖直向上抛出一个小球,经时间t后回到出发点。已知月球的半径为R,万有引力常量为G,则下列说法正确的是:
A.月球表面的重力加速度为v0/t |
B.月球的质量为![]() |
C.宇航员在月球表面获得![]() |
D.宇航员在月球表面附近绕月球做匀速圆周运动的绕行周期为![]() |
BC
试题分析:小球在月球表面做竖直上抛运动,根据匀变速运动规律得:t=
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608417568.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608433502.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608448935.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608464719.png)
所以
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608479980.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608495671.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250036085111041.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003608526660.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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