题目内容
⑴小球从抛出到落至地面的水平距离;
⑵小球落至地面时速度的大小;
⑶在图中测得AB、BC间的水平距离sAB=sBC=0.4 m,高度差hAB=0. 6 m,求高度差hBC.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236449624.gif)
(1)2 m(2)
(3)1m
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236480369.gif)
⑴由平抛运动规律得:
(2分)
(1分)
s=vt=2 m (1分)
⑵
(1分)
(1分)
(2分)
⑶
(2分)
(3分)
(1分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236496466.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236511576.gif)
s=vt=2 m (1分)
⑵
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236511459.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236527526.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236542721.gif)
⑶
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236558620.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236574538.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120236589624.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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