名校
1 . 作用于同一点的三个力
平衡,已知
,且
与
之间的夹角是
,则
的大小是__________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d66f6559857f4e9b12e57c4bba39733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0d62b07aa7cf2d91a90c4d784ffd4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e7d4bc85cf95d858b6d3051e5beff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809f928a25b77674be3116e2e79e6c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8136e8bf2bde87aba070b76e3a3196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad135b14c9dcd83eab6618d7694c7b0.png)
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2024高一下·全国·专题练习
2 . 一条河宽为8 000 m,一船从A处出发垂直航行到达河正对岸的B处,船速为20 km/h,水速为12 km/h,则船到达B处所需时间为________ h.
您最近一年使用:0次
2023高一下·上海·专题练习
3 . 在体育课上,同学们经常要在单杠上做引体向上运动(如图),假设某同学所受重力为
,两臂拉力分别为
,
,若
,
与
的夹角为
,则以下四个结论中:
①
的最小值为
;
②当
时,
;
③当
时,
;
④在单杠上做引体向上运动时,两臂夹角越大越省力.在以上四个结论中,正确的序号为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a27fdbf25481e59e904a6b5ddc0f8c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e7d4bc85cf95d858b6d3051e5beff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809f928a25b77674be3116e2e79e6c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234a12de7ab9b36bd502ee6f62ab3dcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e7d4bc85cf95d858b6d3051e5beff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809f928a25b77674be3116e2e79e6c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ee35e24ffcde543e9aac7ab1e60ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb59e7a7da78531bfa8811635bad6bb.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ad7d1e3fad77908415415d6b2a90f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3676339ee1966f2b4d6bb92958fa20.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd15ead753cf2927f51d07c7727c6cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9c1903b47a674acc0d8c9f1598a96b.png)
④在单杠上做引体向上运动时,两臂夹角越大越省力.在以上四个结论中,正确的序号为
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解题方法
4 . 设
,
,
,
,
,
是平面上两两不相等的向量,若
,且对任意的i,
,均有
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d31123563f9fa6f1c19191384d2237e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153bcd8506607cff0a09f4ca17cfd677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c1e35bc487924bda1549737c8157df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2229805dcd7d474aad1e562d5a713c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f4f8bccb33f565db8aebaafd95bb91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4097261d69159ddd1971070972eb967a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd6d5b881e64db7724b894a4f51dea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d31123563f9fa6f1c19191384d2237e.png)
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2023-12-12更新
|
394次组卷
|
6卷引用:专题06 平面向量(15区新题速递)
(已下线)专题06 平面向量(15区新题速递)上海市虹口区2024届高三上学期期终学生学习能力诊断测试数学试题(已下线)第16讲 第六章 平面向量及其应用 章末重点题型大总结(1)-【帮课堂】(人教A版2019必修第二册)(已下线)专题07 平面几何中的向量方法 向量在物理中的应用-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)专题07 向量应用-《重难点题型·高分突破》(苏教版2019必修第二册)(已下线)专题02 平面向量-《期末真题分类汇编》(上海专用)
名校
解题方法
5 . 已知平面向量
、
、
、
、
、
两两互不相等,且
.若对任意的
,均满足
,则当
且
时,
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153bcd8506607cff0a09f4ca17cfd677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c1e35bc487924bda1549737c8157df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2229805dcd7d474aad1e562d5a713c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f4f8bccb33f565db8aebaafd95bb91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a888636c5acb38972e6712aa34e469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0c2bbb9b4d981a838a3f6ed03d4cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87ec994b8d588f6b7a9ddf61b6b9662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14e88b76e8fbfed5a6b57a9e708fc21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705da8f8cbdbaa518f1c292c6a0763b1.png)
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2023-07-06更新
|
319次组卷
|
4卷引用:8.2 向量的数量积-同步精品课堂(沪教版2020必修第二册)
(已下线)8.2 向量的数量积-同步精品课堂(沪教版2020必修第二册)上海市闵行区2022-2023学年高一下学期期末数学试题上海市复旦大学附属中学2023-2024学年高二上学期开学考试数学试题(已下线)专题02 平面向量-《期末真题分类汇编》(上海专用)
2023高三·上海·专题练习
解题方法
6 . 已知非零平面向量
不平行,且满足
,记
,则当
与
的夹角最大时,
的值为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9697c46bd7150b6e493b5104b07ac50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49ff6e41c2fc6fc368b44347d18384b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/402e6546bafcdc2e485d928458e31ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e6f98f23fea7db0f74897928024ca0.png)
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名校
解题方法
7 . 设x、
,若向量
,
,
满足
,
,
,且向量
与
互相平行,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3dfa65a7cdb880c7ee825ab1cd8f5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee264c98e64b8683af7ccce197e5608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8426ec76a921b832ba2ef0a7d6d07757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1dcaa2046516f4fbbbbac5705d2b0c.png)
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2023-04-13更新
|
946次组卷
|
3卷引用:专题05 向量及其应用
8 . 在集合
中任取一个偶数
和一个奇数
构成一个以原点为起点的向量
,从所有得到的以原点为起点的向量中任取两个向量为邻边作平行四边形,面积不超过4的平行四边形的个数是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cd2052417ccb1650cc533f62273aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5356c8acfb8a0b038387862bd22f6f7c.png)
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名校
解题方法
9 . 已知边长为2的菱形
中,
,P、Q是菱形内切圆上的两个动点,且
,则
的最大值是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284a563413dc0532138fb2a64db8cc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dbdf8648ebbc56720ec14fd91159906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0128ac9baef3ad6abdcf1277e9f72dd.png)
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2023-04-13更新
|
1293次组卷
|
6卷引用:专题05 向量及其应用
(已下线)专题05 向量及其应用上海市浦东新区2023届高三二模数学试题(已下线)第二章 函数的概念与性质 第二节 函数的单调性与最值(B素养提升卷)上海外国语大学附属外国语学校2022-2023学年高一下学期期末数学试题上海市上海师范大学附属宝山罗店中学2024届高三上学期期中数学试题上海市桃浦中学2023-2024学年高三下学期3月月考数学试卷
10 . 已知非零平面向量
、
、
满足
,
,且
,则
的最小值是______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d589af3739b9fca5229e0607bb5f6e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c65b0b13d7b6ee509cc5617145cf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838cbf899e2c8c6dddd7192ec6461bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7d8b42c85013ba07ba18e5e46d8716.png)
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