单选题-单题 适中0.65 引用1 组卷425
如图,一个球形碗固定在水平地面上,一只甲虫(可视为质点)从碗内最低点开始沿左侧缓慢往上爬行,则在爬行过程中( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/a09e57d7-53b6-49e9-8b84-cdb37edd5a05.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/a09e57d7-53b6-49e9-8b84-cdb37edd5a05.png?resizew=178)
A.碗对甲虫的支持力逐渐增大 | B.碗对甲虫的摩擦力逐渐增大 |
C.碗对甲虫的作用力逐渐减小 | D.甲虫所受的合外力逐渐减小 |
2024·福建泉州·一模
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如图所示,一半球状物体放在粗糙的水平地面上,一只甲虫(可视为质点)从半球面的最高点开始缓慢往下爬行,则甲虫爬行过程中( )
![](https://img.xkw.com/dksih/QBM/2016/4/15/1575859086114816/1575859086336000/STEM/36de7930d3ac4161a2acdf7cc34ec7cf.png?resizew=93)
![](https://img.xkw.com/dksih/QBM/2016/4/15/1575859086114816/1575859086336000/STEM/36de7930d3ac4161a2acdf7cc34ec7cf.png?resizew=93)
A.球面对甲虫的支持力变大 | B.球面对甲虫的摩擦力变大 |
C.球面对甲虫的作用力变大 | D.地面对半球体的摩擦力变大 |
如图所示,一半球状物体在粗糙的水平面上,一只甲虫(可视为质点)从半球面的最高点开始缓慢往下爬行,在爬行过程中( )
![](https://img.xkw.com/dksih/QBM/2010/12/9/1575074824462336/1575074852888576/STEM/bed8345a-37c2-4b79-bced-3aef5968840b.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2010/12/9/1575074824462336/1575074852888576/STEM/bed8345a-37c2-4b79-bced-3aef5968840b.png?resizew=156)
A.球面对甲虫的支持力变大 |
B.球面对甲虫的摩擦力变大 |
C.球面对甲虫的作用力不变 |
D.地面对半球体的摩擦力变大 |
如图所示,半球形碗静止在水平地面上,一只蚂蚁在碗内缓慢地从p点向q点爬行,在此过程中( )
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526444807020544/2526797602889728/STEM/843ce432-3382-40de-a391-557f68ecc14f.png?resizew=162)
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526444807020544/2526797602889728/STEM/843ce432-3382-40de-a391-557f68ecc14f.png?resizew=162)
A.蚂蚁受到的摩擦力逐渐变小 |
B.蚂蚁受到的支持力逐渐变小 |
C.碗对蚂蚁的作用力逐渐变小 |
D.碗对地面的摩擦力逐渐变小 |
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