1 . 筒车是我国古代发明的一种水利灌溉工具,既经济又环保.明朝科学家徐光启在《农政全书》中用图画描绘了筒车的工作原理(图1).假定在水流量稳定的情况下,筒车上的每一个盛水筒都做匀速圆周运动.如图2,将筒车抽象为一个半径为
的圆,设筒车按逆时针方向每旋转一周用时120秒,当
时,盛水筒
位于点
,经过
秒后运动到点
,点
的纵坐标满足
,
),则下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222133524889600/3222913034240000/STEM/d602fde155bf4dcdb4da87b386090e73.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222133524889600/3222913034240000/STEM/ea639e3801564c2f83efee5fb932e1db.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc99b235e319c657f757726944349be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fcf2a95dbdd45bdb64875331b773ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89040554aa79926881b74fe954e4d08a.png)
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222133524889600/3222913034240000/STEM/d602fde155bf4dcdb4da87b386090e73.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222133524889600/3222913034240000/STEM/ea639e3801564c2f83efee5fb932e1db.png?resizew=172)
图1 图2
A.筒车转动的角速度![]() |
B.当筒车旋转100秒时,盛水筒![]() ![]() ![]() |
C.当筒车旋转100秒时,盛水筒![]() ![]() |
D.筒车在![]() ![]() ![]() |
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