Equilibrium of a Particle

Presentation on theme: "Equilibrium of a Particle"— Presentation transcript:

1 Equilibrium of a Particle
Newton’s First Law:

2 Equilibrium of a Particle

3 Free-Body Diagrams Free-Body Diagram: Space Diagram:

4

5

6

7 예제 2.6

8 예제 2.6

9 예제 2.6

10 Prob.2.48

11 Prob.2.48

12 Prob. 2.49

13 Prob. 2.49

14 제 3장 힘의 등가계

15 3.2 External and Internal Forces
외력(external forces)

16 3.3 Principle of Transmissibility: Equivalent Forces
O 전달성의 원리(principle of transmissibility)- 등가력 F와 F’는 등가력

17 3.3 Principle of Transmissibility: Equivalent Forces

18 3.3 Principle of Transmissibility: Equivalent Forces

19 정역학 과제 정역학 과제 3 3.34, 3.35, 3.70, 3.80, 3.84, 3.91

20 3.4 Vector Product of Two Vectors

21 3.4 Vector Product of Two Vectors

22 3.5 Vector Products: Rectangular Components

23 3.5 Vector Products: Rectangular Components

24 Review of Vector Calculus
행렬식 (determinant)

25 3.6 Moment of a Force About a Point

26 Moment of a Force About a Point
O 위치벡터 (position vector) 

27 Moment of a Force About a Point

28 3.7 Varignon’s Theorem

29 3.8Rectangular Components of the Moment of a Force

30 Rectangular Components of the Moment of a Force

31 Rectangular Components of the Moment of a Force

32 Sample Problem 3.2

33 문제 3.1

34 문제 3.1

35 문제 3.3

36 문제 3.3

37 문제 3.3

38 3.9 Scalar Product of Two Vectors

39 Scalar Product of Two Vectors: Applications

40 Scalar Product of Two Vectors: Applications

41 Scalar Product of Two Vectors: Applications

42 3.10 Mixed Triple Product of Three Vectors

43 3.12 Moment of a Couple 우력(couple) : 1) 크기가 같고, 2)작용선이 평행하며,
3) 방향이 반대인 두힘F 와 -F.

44 3.12 Moment of a Couple

45 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

46 Moment of a Couple

47 3.13 등가 우력

48

49 3.14 우력의 합성

50 3.15 우력의 벡터 표시

51 3.16 Resolution of a Force Into a Force at O and a Couple

52 Resolution of a Force Into a Force at O and a Couple

53 문제 3.71)

54 (a)

55 (b)

56 (c)

57 문제 3.80)

58 문제 3.80)

59

60

61 문제 3.82)

62 (a)

63 (b)

64 문제 3.90)

65

66 문제 3.80)

67 문제 A) a)

68 b)

69 문제 B

70 문제 B