名校
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,漏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/2021/11/24/2858134176350208/2862692074856448/STEM/fda75ece-e393-40d3-8ce7-0548fdcad07e.png?resizew=208)
![](https://img.xkw.com/dksih/QBM/2021/11/24/2858134176350208/2862692074856448/STEM/36e9a180-6ce4-4988-a291-9da929f121ae.png?resizew=383)
![](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/4ea574fd7de56352696906ef081fb057.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/d65502a7ea4d1ce6d6d8c720845c73e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b40a4fb1bd2e68ec5f7ec899b8edfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9aa99c8402b2899d58540e3cd844be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d553e4a26eb3012410ef7558a5fd6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://img.xkw.com/dksih/QBM/2021/11/24/2858134176350208/2862692074856448/STEM/fda75ece-e393-40d3-8ce7-0548fdcad07e.png?resizew=208)
![](https://img.xkw.com/dksih/QBM/2021/11/24/2858134176350208/2862692074856448/STEM/36e9a180-6ce4-4988-a291-9da929f121ae.png?resizew=383)
A.3.6 | B.3.8 | C.4.0 | D.4.5 |
您最近一年使用:0次