Lecture 10 - Lecture 10 TWO AND THREE-FORCE MEMEBERS...

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Statics: Lecture Notes for Sections 5.4,5.5 1 Lecture 10 * TWO- AND THREE-FORCE MEMEBERS * EQUILIBRIUM IN THREE DIMENSIONS * FREE-BODY DIAGRAMS Section 5.4-5.5 Ehab Zalok APPLICATIONS 2 For a given load on the platform, how can we determine the forces at the joint A and the force in the link (cylinder) BC?
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Statics: Lecture Notes for Sections 5.4,5.5 2 APPLICATIONS (continued) 3 A steel beam is used to support roof joists. How can we determine the support reactions at each end of the beam? Objectives: Students will be able to: a) Recognize two-and three force members. b) Apply equations of equilibrium to solve for unknowns, and, 4
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Statics: Lecture Notes for Sections 5.4,5.5 3 READING QUIZ 1 A rigid body is subjected to forces as 1. A rigid body is subjected to forces as shown. This body can be considered as a ______ member. A) single-force B) two-force C) three-force D) six-force 5 TWO-FORCE MEMBERS & THREE FORCE-MEMBERS (Section 5.4) The solution to some equilibrium problems can be simplified if we recognize members that are subjected to forces at only two points (e.g., at points A and B). 6 If we apply the equations of equilibrium to such a member, we can quickly determine that the resultant forces at A and B must be equal in magnitude and act in the opposite directions along the line joining points A and B.
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Statics: Lecture Notes for Sections 5.4,5.5 4 EXAMPLE OF TWO-FORCE MEMBERS In the cases above members AB can be considered as two force 7 In the cases above, members AB can be considered as two-force members, provided that their weight is neglected.
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This note was uploaded on 02/28/2011 for the course MATH 101 taught by Professor Duke during the Spring '11 term at University of Ottawa.

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Lecture 10 - Lecture 10 TWO AND THREE-FORCE MEMEBERS...

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