题目内容
从地面上以初速度
竖直上抛一物体
,相隔
时间后又以初速度
从地面上竖直上抛另一物体
,要使
、
能在空中相遇,则
应满足的条件是 . ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241153047552659.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304474223.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304677197.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304677210.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304692194.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304708202.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304677197.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304708202.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304677210.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241153047552659.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304770516.gif)
在同一坐标系中作两物体做竖直上抛运动的
图像,如图所示.要A、B在空中相遇,必须使两者相对于抛出点的位移相等,即要求
图线必须相交,据此可从图中很快看出:物体
最早抛出时的临界情形是物体
落地时恰好与
相遇;物体
最迟抛出时的临界情形是物体
抛出时恰好与
相遇.故要使
能在空中相遇,
应满足的条件为:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304770516.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304786202.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304801228.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304817195.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304817195.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304848195.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304817195.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304879203.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304848195.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304801228.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304677210.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115304770516.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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