8.6_Force_SYS

8.6_Force_SYS - ENGR 211 Lecture 8 ENGR 211 Lecture 8 Fall...

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ENGR 211 Lecture 8 Fall 2007 1 Civil Engineering 2 Force Systems 2 Force Systems Applications of Applications of Equilibrium to Structures Equilibrium to Structures ENGR 211 Lecture 8 Fall 2007 Civil Engineering Midterm Closed Book, Closed Notes, Notecard (8½ x 11) 10 to 15 Questions, Multiple Choice Definitions, Concepts, Short Problems
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ENGR 211 Lecture 8 Fall 2007 2 Civil Engineering Equivalent Systems Equivalent Systems • Not necessarily in equilibrium Σ F 1 = Σ F 2 Σ M 1 = Σ M 2 Civil Engineering 2 Force Member 2 Force Member • System of Forces and Moments is equivalent to 2 forces acting on different points • If in equilibrium they must be equal and opposite • If not on the same line of action they form a couple
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ENGR 211 Lecture 8 Fall 2007 3 Civil Engineering Civil Engineering 2 2 – D (Scalar) Equilibrium D (Scalar) Equilibrium Equations Equations Σ F x = 0 Σ F Y = 0 Σ M P = 0
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ENGR 211 Lecture 8 Fall 2007 4 Civil Engineering Civil Engineering
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8.6_Force_SYS - ENGR 211 Lecture 8 ENGR 211 Lecture 8 Fall...

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