chapter 5-2

chapter 5-2 - CEE/ME 241 EQUATIONS OF EQUILIBRIUM IN 2-D...

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CEE/ME 241 1 EQUATIONS OF EQUILIBRIUM IN 2-D Today’s Objectives: Students will be able to a) Apply equations of equilibrium to solve for unknowns, and, b) Recognize two-force members. In-Class Activities: Check homework, if any Reading quiz Applications Equations of equilibrium Two-force members Concept quiz Group problem solving Attention quiz READING QUIZ 1. The three scalar equations F X = F Y = M O = 0, are ____ equations of equilibrium in two dimensions. A) incorrect B) the only correct C) the most commonly used D) not sufficient 2. 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
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CEE/ME 241 2 APPLICATIONS 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? APPLICATIONS (continued) A steel beam is used to support roof joists. How can we determine the support reactions at each end of the beam?
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CEE/ME 241 3 EQUATIONS OF EQUILIBRIUM (Section 5.3) A body is subjected to a system of forces that lie in the x-y plane. When in equilibrium, the net force and net moment acting on the body are zero (as discussed earlier in Section 5.1). This 2-D condition can be represented by the three scalar equations: F x = 0 F y = 0 M O = 0 Where point O is any arbitrary point.
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chapter 5-2 - CEE/ME 241 EQUATIONS OF EQUILIBRIUM IN 2-D...

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