题目内容
(4分)在探究牛顿第二定律实验中采用下图a的装置,通过改变重物的质量,利用计算机可得滑块运动的加速度a和所受拉力F的关系图像。他们在轨道水平和倾斜的两种情况下分别做了实验,得到了两条a-F图线,如图(b)所示。(g=10
)
滑块和位移传感器发射部分的总质量m=_________kg;滑块和轨道间的动摩擦因数
μ= 。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018088647938.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808848432.png)
滑块和位移传感器发射部分的总质量m=_________kg;滑块和轨道间的动摩擦因数
μ= 。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018088647938.png)
0.5 0.2
试题分析:上面直线的函数关系是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808879931.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250018088951122.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808911382.png)
函数关系是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808926634.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808942746.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808911382.png)
倾斜程度(斜率)一样,说明滑块和位移传感器发射部分的总质量在两种情况下是一样的,故
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001809004605.png)
将(1、0)带入
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001808942746.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001809035475.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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