题目内容
(8分)某学习小组的同学想要验证“动能定理”,他们在实验室组装了一套装置,如图所示,另外他们还找到了供打点计时器所用的低压交流电源、导线、复写纸、纸带、小木块、细沙.当滑块连接上纸带,用细线通过滑轮挂上空的小沙桶时,释放小桶,滑块处于静止状态.![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241136454942723.gif)
若你是小组中的一位成员,要完成![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
该项实验,则:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(1)你认为还需要的实验器材有 .![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(2)实验时为了保证滑块受到的合力与沙和沙桶的总重力大小基本相等,沙和沙桶的总质量应满足的实验条件是 ,进行实验操作时,首先要做的步骤是 .![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(3)在(2)的基础上,某同学用天平称量滑块的质量M.往沙桶中装入适量的细沙,用天平称出此时沙和沙桶的总质量m.让沙桶带动滑块加速运动,用打点计时器记录其运动情况,在打点计时器打出的纸带上取两点,测出这两点的间距L和这两点的速度大小v1与v2(v1< v2).则本实验最终要验证的数学表达式为![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(用题中的字母表示实验中测量得到的物理量).![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241136454942723.gif)
若你是小组中的一位成员,要完成
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
该项实验,则:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(1)你认为还需要的实验器材有 .
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(2)实验时为了保证滑块受到的合力与沙和沙桶的总重力大小基本相等,沙和沙桶的总质量应满足的实验条件是 ,进行实验操作时,首先要做的步骤是 .
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(3)在(2)的基础上,某同学用天平称量滑块的质量M.往沙桶中装入适量的细沙,用天平称出此时沙和沙桶的总质量m.让沙桶带动滑块加速运动,用打点计时器记录其运动情况,在打点计时器打出的纸带上取两点,测出这两点的间距L和这两点的速度大小v1与v2(v1< v2).则本实验最终要验证的数学表达式为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(用题中的字母表示实验中测量得到的物理量).
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(8分)(1)天平,刻度尺
(2)沙和沙桶的总质量远小于滑块的质量,平衡摩擦力
(3)
(2)沙和沙桶的总质量远小于滑块的质量,平衡摩擦力
(3)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645650744.gif)
(8分)(1)天平,刻度尺(2分)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(2)沙和沙桶的总质量远小于滑块的质量(2分),平衡摩擦力(2分)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(3)
(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(2)沙和沙桶的总质量远小于滑块的质量(2分),平衡摩擦力(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645478333.jpg)
(3)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824113645650744.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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