题目内容
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,其对应点已在图上标出.(g=9.8 m/s2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250016553411224.png)
(1)作出m-L的关系图线;
(2)弹簧的劲度系数为__________ N/m(结果保留三位有效数字).
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250016553411224.png)
(1)作出m-L的关系图线;
(2)弹簧的劲度系数为__________ N/m(结果保留三位有效数字).
(1)如下图所示:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250016553571484.png)
(2)0.261 N/m(在0.248 N/m~0.262 N/m之间均正确)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250016553571484.png)
(2)0.261 N/m(在0.248 N/m~0.262 N/m之间均正确)
试题分析:m对应的是弹簧受到的拉力大小,所以由胡克定律知图像应连成直线;有胡克定律知,m与L的关系为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001655372750.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250016553881160.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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