Lecture_Notes_for_Sections_4.3_4.4

# Lecture_Notes_for_Se - EQUATIONS OF EQUILIBRIUM TWO AND THREE-FORCE MEMEBERS Todays Objectives Students will be able to a Apply equations of

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EQUATIONS OF EQUILIBRIUM & TWO- AND THREE-FORCE MEMEBERS 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

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READING QUIZ 1. The three scalar equations F X = F Y = M O = 0, are ____ equations of equilibrium in two dimensions. 1) incorrect 2) the only correct 3) the most commonly used 4) 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
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?

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APPLICATIONS (continued) A steel beam is used to support roof joists. How can we determine the support reactions at each end of the beam?
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: x y F 1 F 2 F 3 F 4 O F x = 0 F y = 0 M O = 0

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## This note was uploaded on 10/04/2010 for the course ME 214 taught by Professor Lipovetsky during the Summer '06 term at Cal Poly Pomona.

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Lecture_Notes_for_Se - EQUATIONS OF EQUILIBRIUM TWO AND THREE-FORCE MEMEBERS Todays Objectives Students will be able to a Apply equations of

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