题目内容
(6分)为了测量某一弹簧的劲度系数,将该弹簧竖直悬挂起来,在自由端挂上不同质量的砝码.实验测出了砝码质量m与弹簧长度l的相应数据,其对应点已在下图中标出.(g=9.8 m/s2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500304875739833.jpg)
(1)作出m-l的关系图线;
(2)弹簧的劲度系数为________N/m.(结果保留两位有效数字)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500304875739833.jpg)
(1)作出m-l的关系图线;
(2)弹簧的劲度系数为________N/m.(结果保留两位有效数字)
(1)如图所示:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500304878832898.jpg)
(2)0.24(0.24-0.27)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500304878832898.jpg)
(2)0.24(0.24-0.27)
试题分析:(1)连接图中点,使之成一直线,得图中所示直线;
(2)根据图线的斜率
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003048804704.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250030488191812.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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