ch5_1_StudentnotesF2010

ch5_1_StudentnotesF2010 - EQUILIBRIUM OF A RIGID BODY...

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EQUILIBRIUM OF A RIGID BODY Today’s Objectives : a) Identify support reactions, and, b) Draw a free body diagram. In-Class Activities : Applications Support reactions Free – body diagram Questions and problems
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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?
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APPLICATIONS (continued) A steel beam is used to support roof joists. How can we determine the support reactions Again, how can we make use of an idealized model and a free body diagram to answer this question?
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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 concurrent and may cause rotation of the body (due to the moments created by the forces). For a rigid body to be in equilibrium, the
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ch5_1_StudentnotesF2010 - EQUILIBRIUM OF A RIGID BODY...

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