如图所示,倾角为
的光滑轻杆一端固定在地面上,绕过光滑定滑轮的轻绳一端连接轻弹簧,另一端连接质量
的小球,轻弹簧的另一端连接轻质小环,小环和小球均套在光滑杆上,系统处于静止状态,轻绳与杆的夹角为
,轻弹簧的劲度系数为
,重力加速度
,则轻弹簧的形变量为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/2b7cd41e-63ab-4b2d-8766-c6ca662b9c94.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dee915e2fb7b8a1f4328473f9c18ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab60d0bc70f5659286183947a7e7b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a831fae871c9028a347e59294f7422ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/2b7cd41e-63ab-4b2d-8766-c6ca662b9c94.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23高三上·山西·阶段练习 查看更多[2]
更新时间:2023-01-09 11:31:01
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【推荐1】如图所示,将劲度系数为k的弹簧上端固定在铁架台的横梁上。弹簧下端不挂物体时,测得弹簧的长度为x0,将钩码挂在弹簧下端,待钩码静止时测得弹簧的长度为x1,则钩码的重力大小为( )
A.kx0 | B.kx1 | C.k(x1+x0) | D.k(x1-x0) |
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【推荐2】如图所示,弹簧的劲度系数为k,小球的重力为G,平衡时球在A位置,现用力F将小球向下拉长x至B位置,则此时弹簧的弹力为( )
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874487557570560/2878196720394240/STEM/b5ed65c4-a56c-438a-93cf-371333e72a94.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874487557570560/2878196720394240/STEM/b5ed65c4-a56c-438a-93cf-371333e72a94.png?resizew=115)
A.G-kx | B.kx-G |
C.kx+G | D.kx |
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【推荐1】春光明媚的四月,天空中到处飘荡着各色各样的风筝。如图所示,巨大的风筝浮在空中,风筝线上拴着两个一定质量的“葫芦娃”。将“葫芦娃”视为质点,不考虑它们受到的空气作用力,当风筝及“葫芦娃”相对地面静止时( )
![](https://img.xkw.com/dksih/QBM/2022/5/22/2985107690651648/2985437467820032/STEM/d05e7466-a4c4-4d31-84d7-fd7c30a2773b.jpg?resizew=238)
![](https://img.xkw.com/dksih/QBM/2022/5/22/2985107690651648/2985437467820032/STEM/d05e7466-a4c4-4d31-84d7-fd7c30a2773b.jpg?resizew=238)
A.风筝线1、2、3的张力值相等 |
B.风筝线1的张力值大于风筝线2的张力值 |
C.风筝线2的张力值小于风筝线3的张力值 |
D.风筝线1的张力值小于风筝线3的张力值 |
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【推荐2】如图所示,两光滑直硬杆1、2一端固定在水平面上(两杆在同一竖直平面内),与水平面之间的夹角分别为
,轻质小环套在杆2上,质量
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,
,
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/552a869a-a957-4c8e-acdc-f9127e2d0597.png?resizew=165)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图所示,水平面上放有三个木块
、
、
,质量均为
,
、
与地面间的接触面光滑,
与地面间的动摩擦因数
,
、
之间用轻弹簧相连,
、
之间用轻绳相连.现在给
一个水平向右、大小为
的拉力
,使
、
、
三个木块一起以相同的加速度向右做匀加速直线运动.某一时刻撤去拉力
,则撤去力
的瞬间,轻绳中的张力
为(重力加速度
取
)( )
![](https://img.xkw.com/dksih/QBM/2019/6/14/2225294075994112/2225611667750912/STEM/689b65ac-397a-430d-93b5-c6c0db8f386e.png?resizew=250)
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A.0 | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,质量分别为
和
的物块A、B放在光滑水平面上并用轻质弹簧相连,今用大小为
的水平恒力作用在A上,使A、B相对静止且一起向左做匀加速直线运动,若该弹簧劲度系数为
,则下列说法正确的是( )
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A.物块A、B一起做匀加速运动时,A的加速度大小为![]() |
B.物块A、B一起做匀加速运动时,弹簧的伸长量为![]() |
C.突然撤去力F的瞬间,A的加速度大小为![]() |
D.突然撤去力F的瞬间,B的加速度为0 |
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