ch5_5_student_notesF2010

ch5_5_student_notesF2010 - RIGID BODY EQUILIBRIUM IN 3-D...

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RIGID BODY EQUILIBRIUM IN 3-D (Sections 5.5 – 5.7) Today’s Objective : a) Identify support reactions in 3-D and draw a free body diagram, and, b) apply the equations of equilibrium. In-Class Activities : Applications Support reactions in 3-D Equations of equilibrium Questions and problems
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APPLICATIONS Ball-and-socket joints and journal bearings are often used in mechanical systems. How can we determine the support reactions at these joints for a given loading?
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APPLICATIONS (continued) The weights of the fuselage and fuel act through A, B, and C. How will we determine the reactions at the wheels D, E and F ? A 50 lb sign is kept in equilibrium using two cables and a smooth collar. How can we determine the reactions at these supports?
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SUPPORT REACTIONS IN 3-D (Table 5-2) As a general rule, if a support prevents translation of a body in a given direction, then a reaction force acting in the opposite direction is developed on the body. Similarly, if rotation is prevented
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ch5_5_student_notesF2010 - RIGID BODY EQUILIBRIUM IN 3-D...

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