题目内容
某实验小组在“实验探究:探究物体碰撞时动量变化规律”的实验中,采用如图2(a)所示装置,通过半径相同的
、
两球的碰撞来进行探究。图中
是斜槽,
为水平槽。实验时先使
球从斜槽上某一固定位置
由静止开始滚下,落到位于水平地面的记录纸上,留下痕迹。重复上述操作10次,得到10个落点痕迹。再把
球放在水平槽上靠近末端的地方,让
球仍从位置
自静止开始滚下,和
球碰撞后,
、
球分别在记录纸上留下各自的落点痕迹。重复这种操作10次。图中的
点是水平槽末端
在记录纸上的垂直投影点。
球落点痕迹如图2(b)所示,其中米尺水平放置,且平行于
、
、
所在平面,米尺的零点与
点对齐。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082414423474010748.png)
(1)要求
和
的关系: ,碰撞后
球的水平射程应取为 cm。
(2)在以下选项中,本次实验必须进行的测量是 (填选项号)
E.测量
点相对水平槽面的高度。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232135300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232228309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232322399.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232681405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232135300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232806316.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232228309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232135300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232806316.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232228309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232135300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232228309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144233601292.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144233976303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232228309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232806316.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144233976303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144233601292.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144233601292.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082414423474010748.png)
(1)要求
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144234865399.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144234974389.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232228309.png)
(2)在以下选项中,本次实验必须进行的测量是 (填选项号)
A.水平槽上未放![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() ![]() |
C.测量![]() ![]() |
D.测量![]() ![]() |
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144232806316.png)
(1)
>
64.0±0.5 (2)ABD
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144234865399.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824144234974389.png)
(1)为了使两球在落地时,能拉开距离方便测量,所以A球的质量大于B球的质量,用圆规画圆,使所有点圈在园内,则为落地点(2)由于两球做平抛运动的起始点都是斜槽末端,不需要测量小球直径
![](http://thumb2018.1010pic.com/images/loading.gif)
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