Equilibrium of a Particle Newton’s First Law:
Equilibrium of a Particle
Free-Body Diagrams Free-Body Diagram: Space Diagram:
예제 2.6
예제 2.6
예제 2.6
Prob.2.48
Prob.2.48
Prob. 2.49
Prob. 2.49
제 3장 힘의 등가계
3.2 External and Internal Forces 외력(external forces)
3.3 Principle of Transmissibility: Equivalent Forces O 전달성의 원리(principle of transmissibility)- 등가력 F와 F’는 등가력
3.3 Principle of Transmissibility: Equivalent Forces
3.3 Principle of Transmissibility: Equivalent Forces
정역학 과제 정역학 과제 3 3.34, 3.35, 3.70, 3.80, 3.84, 3.91
3.4 Vector Product of Two Vectors
3.4 Vector Product of Two Vectors
3.5 Vector Products: Rectangular Components
3.5 Vector Products: Rectangular Components
Review of Vector Calculus 행렬식 (determinant)
3.6 Moment of a Force About a Point
Moment of a Force About a Point O 위치벡터 (position vector)
Moment of a Force About a Point
3.7 Varignon’s Theorem
3.8Rectangular Components of the Moment of a Force
Rectangular Components of the Moment of a Force
Rectangular Components of the Moment of a Force
Sample Problem 3.2
문제 3.1
문제 3.1
문제 3.3
문제 3.3
문제 3.3
3.9 Scalar Product of Two Vectors
Scalar Product of Two Vectors: Applications
Scalar Product of Two Vectors: Applications
Scalar Product of Two Vectors: Applications
3.10 Mixed Triple Product of Three Vectors
3.12 Moment of a Couple 우력(couple) : 1) 크기가 같고, 2)작용선이 평행하며, 3) 방향이 반대인 두힘F 와 -F.
3.12 Moment of a Couple
Quiz 1 1. 그림 1에서, 각 점(A-F)에서 발생하는 모멘트를 구하시오. 2. 그림 2에서, 각 점(A-H)에서 발생하는 모멘트를 구하시오. 그림 1 그림 2
Moment of a Couple
3.13 등가 우력
3.14 우력의 합성
3.15 우력의 벡터 표시
3.16 Resolution of a Force Into a Force at O and a Couple
Resolution of a Force Into a Force at O and a Couple
문제 3.71)
(a)
(b)
(c)
문제 3.80)
문제 3.80)
문제 3.82)
(a)
(b)
문제 3.90)
문제 3.80)
문제 A) a)
b)
문제 B
문제 B