1 . 我们来看一个简谐运动的实验将塑料瓶底部扎一个小孔做成一个漏斗,再挂在架子上,就做成了一个简易单摆在漏斗下方放一块纸板,板的中间画一条直线作为坐标系的横轴,把漏斗灌上细沙并拉离平衡位置,放手使它摆动,同时匀速拉动纸板,这样就可在纸板上得到一条曲线,它就是简谐运动的图象它表示了漏斗对平衡位置的位移
(纵坐标)随时间
(横坐标)变化的情况如图所示,已知一根长为
的线一端固定,另一端悬挂一个漏斗溺斗摆动时离开平衡位置的位移
(单位:
)与时间
(单位:
)的函数关系是
,其中
,
.则估计线的长度应当是( )(精确到
)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712253610491904/2716459013857280/STEM/705e4bfa-4f40-4121-8de0-e42aa3e0e1ae.png?resizew=226)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712253610491904/2716459013857280/STEM/a714af0d-fdf9-4a82-aab9-d799b5b3dd54.png?resizew=421)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c3088ea1022684d2cae75926f2b251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32d32dad43474ca2bb00090a1aea164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729450de7270eee79f8abf657738eab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a061dce0c7716ceab53159cd4ce7904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712253610491904/2716459013857280/STEM/705e4bfa-4f40-4121-8de0-e42aa3e0e1ae.png?resizew=226)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712253610491904/2716459013857280/STEM/a714af0d-fdf9-4a82-aab9-d799b5b3dd54.png?resizew=421)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:高考新疆维吾尔自治区乌鲁木齐地区2021届高三二模数学(理)试题
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