题目内容
.((6分)某同学用如图所示的装置进行“验证动量守恒定律”的实验:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014039591775.png)
①先测出可视为质点的两材质相同滑块A、B的质量分别为
、
及滑块与桌面间的动摩擦因数
.
②用细线将滑块A、B连接,使A、B间的轻弹簧处于压缩状态,滑块B恰好紧靠桌边.
③剪断细线,测出滑块B做平拋运动的水平位移
,滑块A沿水平桌面滑行距离为
(未滑出桌面).为验证动量守恒定律,写出还需测量的物理量及表示它们的字母_____________________________________;如果动量守恒,需要满足的关系式为________________.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014039591775.png)
①先测出可视为质点的两材质相同滑块A、B的质量分别为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001403975337.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001403990399.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404006301.png)
②用细线将滑块A、B连接,使A、B间的轻弹簧处于压缩状态,滑块B恰好紧靠桌边.
③剪断细线,测出滑块B做平拋运动的水平位移
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404037300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404053331.png)
物体B下降的高度
(2分) ,
(4分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404068313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014040681213.png)
试题分析: 剪断细线后B做平抛运动,要求得B的初速度,需要知道运动的高度和水平距离,所以还需要测量桌面离地面的高度
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404068313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404099650.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404115513.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404131806.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014041461045.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404162722.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001404193697.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014040681213.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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