文档介绍：平面向量概念教案
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang c00,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
在数学中，我们把这种既有大小、又有方向的量叫做向量。而把那些只有大小，没有方向的量叫数量。
（二）讲授新课
1、向量的概念
练****1  对于下列各量：
①质量   ② 速度   ③位移   ④力   ⑤加速度   ⑥路程   ⑦密度   ⑧功   ⑨体积   ⑩温度
其中，是向量的有：②③④⑤
2、向量的几何表示
请表示一个竖直向下、大小为5N的力，和一个水平向左、大小为8N的力（1厘米表示1N）。思考一下物理学科中是如何表示力这一向量的？
 
（1）有向线段及有向线段的三要素
（2）向量的模
（4）零向量，记作＿＿＿＿；
（5）单位向量
练****2  边长为6的等边△ABC中， ＝＿＿，与 相等的还有哪些？ 
 
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily