1 . 已知矩形
中,宽为2,长为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d222a09e919876b192f6fbe828b880.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68506f4cb3695bea27726197873ffaba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d222a09e919876b192f6fbe828b880.png)
您最近一年使用:0次
2 . 质点
受到两个力
,
的作用,若
,
,
,求这两个力的合力
的大小及方向.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9b1c2f17ed5fdb44c197305182afeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab9317ff5e40e233587416c4af5e9cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71430f32406d05ad9d25a4a74c44eb0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21147c724db2681bf532376dfecce58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e181734b18fff98c27dd6a2816aa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcbd7f3addaf52735d63aa2da75a6e.png)
您最近一年使用:0次
3 . 已知质点
受到三个力
,
,
的作用,若它们的大小分别为
,
,
,且三个力之间的夹角都为
,求合力的大小和方向.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9b1c2f17ed5fdb44c197305182afeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab9317ff5e40e233587416c4af5e9cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f168db19f299258fc8d1b0fe86db538d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0ca47758988f5902d99c7c6deba468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9599144db666c8db09df9fc3d44ea002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791c0823fd3388a2260494cbf640a0e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
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2019-11-11更新
|
110次组卷
|
3卷引用:沪教版 高二年级第一学期 领航者 第八章 8.4向量的应用
名校
4 . 如图,在
中,
是线段
上的一点,且
,过点
的直线分别交直线
于点
,若
,
,则
的最小值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f435ae298a22ca0875c41b0c4730ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abd34df1150309cb07ac490e493abf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd63c1b2b44374c2886a4651ccc53779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f255e037d44674bca7aee865593092.png)
![](https://img.xkw.com/dksih/QBM/2016/4/20/1572599848001536/1572599853883392/STEM/a3018f52d4f8474ea62613dea424c34c.png?resizew=254)
您最近一年使用:0次
2016-12-04更新
|
578次组卷
|
2卷引用:上海市南汇中学2018-2019学年高二上学期期中数学试题
13-14高一下·安徽阜阳·期中
5 . 在四边形
中,
,则该四边形的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4b26ce4933a745e4e4de25c07f2d16.png)
A.![]() | B.![]() | C.5 | D.15 |
您最近一年使用:0次
2016-12-04更新
|
357次组卷
|
3卷引用:2015-2016学年湖南衡阳八中高二下期末数学(文)试卷
2015-2016学年湖南衡阳八中高二下期末数学(文)试卷(已下线)2013-2014学年安徽省阜阳市阜阳一中高一下学期期中考试数学试卷人教A版(2019) 必修第二册 逆袭之路 第六章 6.4 平面向量的应用 6.4.2 向量在物理中的应用举例
6 . 直线
的一个方向向量
则
与直线
的夹角为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a25ab2832b8d1e5bd4c8fb440565d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
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7 . 在△ABC中,若AB=AC,D、E分别是AB、AC的中点,则( ).
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
8 .
是单位向量,且
,若
,
,则向量
,
的夹角为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4868d6790066750d6fc1b361b41bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a6b595e8e8969a0b762f493642e4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003ff99c50566c347765bde4ed16d09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889e16c4a7a67a100276510dff7db34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
您最近一年使用:0次
解题方法
9 . 如下图所示,在平行四边形
中,
,
,用向量
,
表示
,
,并回答下面几个问题:
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619407843115008/1619407843614720/STEM/c9a3fee157034d688aee2f5d739d763f.png?resizew=319)
(1)当
满足什么条件时,
与
垂直;
(2)当
满足什么条件时,
;
(3)
与
有可能是相等向量吗.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac265febbf99dccf51aa0a2253e61f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44a918c7cfd942d3a53e584c26685a8.png)
![](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/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fe7e40356acd24eb908a7f3ab28229.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619407843115008/1619407843614720/STEM/c9a3fee157034d688aee2f5d739d763f.png?resizew=319)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb371bd7728c6d6a16533a93924ad998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11042e4d0e1a076a9a5a6b2611db5256.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
您最近一年使用:0次
名校
10 . 已知向量
与向量
平行,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77caf5dad9b85493b3ddb39b3e81df98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6575461aebc31bc4a13364be90266254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9e31d4524a63074fdac37088160bd9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
353次组卷
|
5卷引用:2016-2017学年河北正定中学高二上月考一数学(理)试卷