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Lecture Notes Ch 5 pdf

# Lecture Notes Ch 5 pdf - EQUILIBRIUM OF A RIGID BODY UNDER...

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EQUILIBRIUM OF A RIGID BODY UNDER A GENERAL LOAD DISTRIBUTION FUNDAMENTAL STEPS FORCES MUST INCLUDE ALL APPLIED LOADS , AND ALL REACTION FORCES FROM SURROUNDING STRUCTURE DRAW THE FREEBODY DIAGRAM (FDB) INCLUDING ALL FORCES SELECT THE BODY YOU WISH TO ANALYZE FOR EQILIBRIUM DETERMINE THE NUMBER OF UNKNOWNS IN YOUR FBD FOR EQUILIBRIUM , VECTOR SUM OF ALL FORCES = 0 (3 EQNS( 3-D), 2 EQUN(2-D) SUM OF THE MOMENTS OF THE SYSTEM OF FORCES ABOUT ANY POINT = 0 (3 EQNS( 3-D), 2 EQUN(2-D) ANALYZE THE GEOMETRICAL CONSTRAINTS IF YOU NEED MORE EQUATIONS

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Proper Improper

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Examples of Incomplete Free-body Diagrams

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Equilibrium Equations Force Moment Solution FBD of the person
FBD of the bracket Note that Equations of Equilibrium Force Equations Moment Equation Solution

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Solution to Problem 5.41 Continued…. Equations of Equilibrium Force-Equations Moment-Equation Answer

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FBD of the Beam Equations of Equilibrium Force-Equations Moment-Equation Problem (a) is statically
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