如图,一个半径为
的定滑轮由绳索带动重物上升,如果该定滑轮逆时针旋转了
,假设绳索(粗细不计)与滑轮之间没有滑动,那么重物上升的高度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce710269ec0786472cad1bb73ee7d3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-04-19 21:29:31
|
【知识点】 求某点的弧形运动路径长度解读
相似题推荐
单选题
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较易
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【推荐1】如图,一块含有
角的直角三角板
,在水平桌面上绕点C按顺时针方向旋转到三角板
的位置,若
,则顶点A在旋转过程中所经过的路径长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818309e7b9a67c54ab1530fdb4b0edc0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/685df66f-51d4-426a-8a23-96c4d55a54d9.png?resizew=190)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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较易
(0.85)
【推荐2】如图,将
绕点
顺时针旋转
得到
,则点
经过的路径长为( )
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712454832193536/2713834356752384/STEM/d54273ac-5496-4788-bca6-d7999478c45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef396a57ebb8895473bfa2d63340a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712454832193536/2713834356752384/STEM/d54273ac-5496-4788-bca6-d7999478c45e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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