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03 - 3 3-1 1 2 a a 3-2 1 1 s=a b 2 a b=b a 3(a b c = a(b c...

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3장. 벡터 3-1 벡터와 스칼라 1. 스칼라양과 벡터량 스칼라양: 크기만 있는 양 (보기: 온도, 질량) 벡터량: 크기와 방향이 있는 양 (보기: 풍속, 변위, 힘, 가속도) 2. 벡터량을 나타내는 기호: a , a 그림. 벡터의 화살표 표현 및 동등성 (크기와 방향이 같으면 같은 벡터)

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3-2 벡터 덧셈, 뺄셈 1. 벡터 덧셈 1) 정의 s = a + b 그림. 벡터덧셈의 정의 2) 교환법칙 a + b = b + a 그림. 벡터 덧셈의 교환법칙 3) 결합법칙 ( a + b ) + c = a + ( b + c ) 그림. 벡터 덧셈의 결합법칙
2. 벡터 뺄셈 1) 벡터 b 의 반대벡터(음의 벡터) - b 정의 b + (- b ) 0 2) 벡터 뺄셈의 정의 d = a - b a + (- b ) 그림. b - b , 벡터 뺄셈의 정의 벡터의 뎃셈, 뺄셈은 같은 종류의 벡터에 대해서만 정의함

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3-3,4,5 단위벡터, 좌표성분, 벡터 덧셈 1. 단위벡터의 정의: 각 좌표축 방향의, 길이가 1인 벡터 그림. 직각좌표계에서의 단위벡터 2. 단위벡터를 이용한 벡터의 성분표현 a =
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