图示刚体在一个平面汇交力系作用下处于平衡，以下四组平衡方程中哪一组是不独立的<img src=https://huaweicloudobs.ahjxjy.cn/07088274D15325232B14A583B58DA6B7.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

【单选题】【消耗次数：1】

① SmA(F) = 0, SmB(F) = 0；

② SX = 0,SY = 0；

③ SX = 0,SmA(F) = 0；

④ SmA(F) = 0,SmC(F) = 0。

参考答案：

复制

纠错

相关题目

【单选题】图示刚体在一个平面任意力系作用下处于平衡，以下四组平衡方程中哪一组是不独立的<img src=https://huaweicloudobs.ahjxjy.cn/658715F53C5600996C2DAE9F34592209.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

① SX = 0, Sx = 0, SmA(F) = 0；

② SmO(F) = 0,SmA(F) = 0,SmB(F) = 0；

③ SmO(F) = 0,SmC(F) = 0,SY = 0；

④ SX = 0,SY = 0,SmO(F) = 0。

查看完整题目与答案

【单选题】图示刚体在一个平面任意力系作用下处于平衡，以下四组平衡方程中哪一组是不独立的<img src=https://huaweicloudobs.ahjxjy.cn/06BB3A04A730753D2E54272845D85329.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

① SX = 0, SmO(F) = 0, SmA(F) = 0；

② SmO(F) = 0,SmA(F) = 0,SmB(F) = 0；

③ SmA(F) = 0,SmC(F) = 0,SY = 0；

④ SX = 0,SmA(F) = 0,SmB(F) = 0。

查看完整题目与答案

【单选题】图示刚体在一个平面平行力系作用下处于平衡，以下四组平衡方程中哪一组是不独立的<img src=https://huaweicloudobs.ahjxjy.cn/BDBF820C901DE09635B4CEEC5DDED073.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

① SY = 0, SmO(F) = 0；

② SX = 0,SmO(F) = 0；

③ SX’ = 0,SmO(F) = 0；

④ SmO(F) = 0,SmA(F) = 0。

查看完整题目与答案

【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/0FDBAE0BF64385130F1B9F25F9506F60.png title=QQ截图20170105212445.png alt=QQ截图20170105212445.png/>

① <img src=https://huaweicloudobs.ahjxjy.cn/41817FF339015A409172DAAB0A9128E8.png title=QQ截图20170105212454.png alt=QQ截图20170105212454.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/1DB0D02372ABB2BFA9D9424EEC3B7D0C.png title=QQ截图20170105212501.png alt=QQ截图20170105212501.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/678930E430843301050DBED4C00E8C38.png title=QQ截图20170105212509.png alt=QQ截图20170105212509.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/8860A577BE8D2ED7E295DD4D1156E5D1.png title=QQ截图20170105212518.png alt=QQ截图20170105212518.png/>

查看完整题目与答案

【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/B8E519D255F410DEC0CBB04218E47B10.png title=QQ截图20170105215205.png alt=QQ截图20170105215205.png/>

① <img src=https://huaweicloudobs.ahjxjy.cn/34818CD139B9C2A89F700C4CB4ED8444.png title=QQ截图20170105215213.png alt=QQ截图20170105215213.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/CA00968537D2720B487C7DA5112B6CE6.png title=QQ截图20170105215221.png alt=QQ截图20170105215221.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/E5EDFF71C1A83E73D1ECFC332B560AC3.png title=QQ截图20170105215228.png alt=QQ截图20170105215228.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/C4AD6AA9862BB41C2128B5C65D32DA70.png title=QQ截图20170105215235.png alt=QQ截图20170105215235.png/>

查看完整题目与答案

【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/61F8A6F0F8BE0A0C651305EA8B11C67F.png title=9.png alt=9.png/>

① <img src=https://huaweicloudobs.ahjxjy.cn/DDD03410463A17F7BB0928DDC87DC4E3.png title=9-1.png alt=9-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/E2089276570F6A29A7001E28A578C79C.png title=9-2.png alt=9-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/A16E80AEC6A2954247404FC859C1E08B.png title=9-3.png alt=9-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/283458DD28D97960EB4224F2F9B25D89.png title=9-4.png alt=9-4.png/>

查看完整题目与答案

【单选题】图示为作用在刚体上的四个大小相等且互相垂直的力(F1, F2, F3, F4) F1 = F2 = F3 = F4 = F所组成的平面任意力系，其简化的最后结果为<img src=https://huaweicloudobs.ahjxjy.cn/FDE09CFFDBC1F3F2DCA962B8F81419E0.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

① 过A点的合力；

② 力偶；

③ 平衡；

④ 过O点的合力。

查看完整题目与答案

【单选题】一圆盘置于光滑水平面上，开始处于静止。当它受图示力偶(F,F)作用后<img src=https://huaweicloudobs.ahjxjy.cn/22D92F060D8AE77B36E1F4298B40CA77.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

① 其质心C将仍然保持静止；

② 其质心C将沿图示轴方向作直线运动；

③ 其质心C将沿某一方向作直线运动；

④ 其质心C将作曲线运动。

查看完整题目与答案

【单选题】一质点从高为处以初速度垂直下落，选轴垂直向上（如图），则该点的运动方程为<img src=https://huaweicloudobs.ahjxjy.cn/F16BF78BF15A9427E57978CFAB6508E0.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>

① <img src=https://huaweicloudobs.ahjxjy.cn/D4B971C8078000571C89FEBE62857954.png style= title=3.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/07BEB4DDA7E9BBA199C6D4D607E6CEED.png title=2.png style=white-space: normal;/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/8BF5518CD69354475BF92E1141A61903.png title=1.png style=white-space: normal;/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/A8B103314B0F6CA97646C6D84752ABC7.png title=4.png style=white-space: normal;/>

查看完整题目与答案

【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/9B21F907750B4844B0B5F7D4C0FA86DD.png title=8.png alt=8.png/>

① <img src=https://huaweicloudobs.ahjxjy.cn/D365A6996CDA332DC493B9FE9927EB94.png title=8-1.png alt=8-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/4E4AD50C574720FCF94807F6927CC7C6.png title=8-2.png alt=8-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/5EE23578A59D53D47F078A43D4A139A6.png title=8-3.png alt=8-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/FEC57F19F806EEC34B18729DE09E7B87.png title=8-4.png alt=8-4.png/>

查看完整题目与答案

随机题目

【单选题】 -- How long ______ you ______ the library book?-- For three days.

① have; borrowed

② have; kept

③ borrow

④ were; kept

查看完整题目与答案

【单选题】 I ____ up early this morning, so I stayed in bed until 8 o’clock a.m. .

① needn’t have got

② didn’t need to get

③ shouldn’t have got

④ can’t have got

查看完整题目与答案

【单选题】 Only in this way ____ out of the plan.

① you can talk him

② him can you talk

③ him you can talk

④ can you talk him

查看完整题目与答案

【单选题】 People at the party worried about him, because no one was aware ______ he had gone.

① of where

② of the place where

③ where

④ the place

查看完整题目与答案

【单选题】 If you drink too much, your health will get even ____.

① bad

② poor

③ worse

④ not well

查看完整题目与答案

【单选题】 I haven’t seen her for years, but I could still ____ her voice on the phone.

① recognize

② realize

③ hear

④ know

查看完整题目与答案

【单选题】 As I knew him better, I discovered that my____ had been right.

① enjoyment

② improvement

③ impression

④ environment

查看完整题目与答案

【单选题】 They invited the three of ____, Bob, Joe, and ____.

① us…me

② we… we

③ us…I

④ we…I

查看完整题目与答案

【单选题】 His explanation is not at all clear. I find it ____.

① essential

② confusing

③ awful

④ puzzled

查看完整题目与答案

【单选题】 Things never went _____ as we had expected

① so smoothly

② smooth

③ so smooth

④ smoothly

查看完整题目与答案