题目内容
如图所示,一个做平抛运动的小球,先后通过
、
、
三点,若相邻两点间的水平距离均为
,竖直距离分别为
和
,则抛出该球的初速度大小为 ;取
、
之间的水平距离
m,竖直高度差
m,若小球以大小为2m/s的水平速度抛出,则竖直高度差
m.(不计空气阻力
m/s2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241238558514195.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855476287.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855492308.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855507252.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855523260.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855539351.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855570369.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855585380.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855726347.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855741426.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855757540.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855788392.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855835417.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241238558514195.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855882718.png)
竖直方向上:
,水平方向上:
,联立可得抛出该 球的初速度大小为
,水平距离
m,竖直高度差
m,若小球以大小为2m/s的水平速度抛出,代入数据可得竖直高度差
1m
故答案为:
,1
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855897765.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855929491.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855882718.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855741426.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855757540.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855788392.png)
故答案为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123855882718.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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