单选题-单题 较易0.85 引用4 组卷310
如图所示,门上有两个点a和b(可视为质点),若它们与门一起绕轴OO′转动,a、b两个点的角速度分别为ωa和ωb,线速度大小分别为va和vb,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/9582465e-9c1b-4620-8d19-77a5796edb94.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/9582465e-9c1b-4620-8d19-77a5796edb94.png?resizew=132)
A.ωa=ωb,va<vb | B.ωa=ωb,va>vb |
C.ωa<ωb,va=vb | D.ωa>ωb,va=vb |
2017高二下·江苏南京·学业考试
类题推荐
如图所示,转动的跷跷板上A、B两点线速度大小分别为vA和vB,角速度大小分别为ωA和ωB,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/87115173-e08d-4198-9dbf-9751c6fe73be.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/87115173-e08d-4198-9dbf-9751c6fe73be.png?resizew=180)
A.vA>vB,ωA=ωB | B.vA=vB,ωA>ωB |
C.vA<vB,ωA=ωB | D.vA=vB,ωA<ωB |
如图所示,转动的跷跷板上A、B两点线速度大小分别为vA和vB,角速度大小分别为ωA和ωB,则( )
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460562553790464/2461270409265153/STEM/47614818-03a4-45d5-be80-168dfcd7b08e.png?resizew=265)
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460562553790464/2461270409265153/STEM/47614818-03a4-45d5-be80-168dfcd7b08e.png?resizew=265)
A.vA=vB,ωA=ωB | B.vA=vB,ωA≠ωB |
C.vA<vB,ωA=ωB | D.vA>vB,ωA≠ωB |
如图所示,用起瓶器打开瓶盖,起瓶器上A、B两点绕O点转动的角速度分别为ωA和ωB,线速度大小分别为vA和vB,则( )
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874487446601728/2878183652532224/STEM/a169cbb9-b1df-4373-bbc8-8b50460c0a6a.png?resizew=135)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874487446601728/2878183652532224/STEM/a169cbb9-b1df-4373-bbc8-8b50460c0a6a.png?resizew=135)
A.ωA=ωB,vA>vB | B.ωA=ωB,vA<vB |
C.ωA<ωB,vA=vB | D.ωA>ωB,vA=vB |
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