chapter 5-1

# chapter 5-1 - CEE/ME 241 EQUILIBRIUM OF A RIGID BODY...

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CEE/ME 241 1 EQUILIBRIUM OF A RIGID BODY Today’s Objectives : Students will be able to a) Understand Conditions of Equilibrium b) Identify support reactions, and, c) Draw a free diagram. In-Class Activities : Reading Quiz Applications Support reactions Free – body diagram Concept quiz Group problem solving Attention quiz READING QUIZ 1. If a support prevents translation of a body, then the support exerts a ___________ on the body. A) couple moment B) force C) Both A and B. D) None of the above 2. Internal forces are _________ shown on the free body diagram of a whole body. A) always B) often C) rarely D) never

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CEE/ME 241 2 APPLICATIONS A 200 kg platform is suspended off an oil rig. How do we determine the force reactions at the joints and the forces in the cables? How are the idealized model and the free body diagram used to do this? Which diagram above is the idealized model? APPLICATIONS (continued) A steel beam is used to support roof joists. How can we determine the support reactions at A & B? Again, how can we make use of an idealized model and a free body diagram to answer this question?
CEE/ME 241 3 CONDITIONS FOR RIGID-BODY EQUILIBRIUM (Section 5.1) In contrast to the forces on a particle, the forces on a rigid-body are not usually

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chapter 5-1 - CEE/ME 241 EQUILIBRIUM OF A RIGID BODY...

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