题目内容
如图所示,三维坐标系
的
轴方向竖直向上,所在空间存在沿
轴正方向的匀强电场。一质量为
、电荷量为
的小球从
轴上的
点以速度
水平抛出,
点坐标为(
,
,
),重力加速度为
,场强
。则下列说法中正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250008214292058.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821102521.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821117231.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821211310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821226337.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821258330.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821117231.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821289300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821304265.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821289300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821336262.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821336262.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821382280.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821398273.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821414654.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250008214292058.jpg)
A.小球运动的轨迹为抛物线 |
B.小球在![]() |
C.小球到达![]() ![]() |
D.小球的运动轨迹与![]() ![]() ![]() ![]() |
AB
试题分析:小球在水平抛出后受力情况为:沿Z轴负方向的重力mg,沿y正方向的电场力
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821570832.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821648625.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821663510.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821460404.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821694323.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821726266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250008217261129.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821476466.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821757908.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821476466.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821788422.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821804837.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821476466.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821819267.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821835620.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821850643.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821866866.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821476466.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000821897873.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目