题目内容
在地面以v0=300 m/s的速度竖直向上发射质量m=4 kg的人工降雨弹,降雨弹到达最高点时爆炸撒播催雨剂.空气阻力忽略不计.求人工降雨弹:
(1)离地瞬时的动能;
(2)上升至最高点所增加的重力势能;
(3)上升的最大高度.(g取10 m/s2)
(1)离地瞬时的动能;
(2)上升至最高点所增加的重力势能;
(3)上升的最大高度.(g取10 m/s2)
(1)
(2)
(3) ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115746538731.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115746491901.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241157465071008.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115746538731.jpg)
⑴
……………………(2分)
⑵
……………………(2分)
⑶
……………………(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115746553705.gif)
⑵
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115746569619.gif)
⑶
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115746585640.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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