ME214StaticsChapter4Springl2007

# ME214StaticsChapter4Springl2007 - Lecture 13 Chapter...

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ME 214 Vector Statics Chapter 4 Instructor: A Rezaei Today’s Objective: Students will be able to: Students will be able to: a) a) Identify support reactions, and, b) b) Draw a free-body diagram. CONDITIONS FOR RIGID-BODY EQUILIBRIUM FREE-BODY DIAGRAMS Illustration 1 Given: An operator applies 20 lb to the foot pedal. A spring with k = 20 lb/in is stretched 1.5 in. Draw: A free-body diagram of the foot pedal. For a rigid body to be in equilibrium, the net force as well as the net moment about any arbitrary point O must be equal to zero. F = 0 and M O = 0

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Illustration2 SUPPORT REACTIONS IN 2-D
EXAMPLE 1 Given: Weight of the boom = 125 lb, the center of mass is at G, and the load = 600 lb. Find: Support reactions at A and B. Example 2 GROUP PROBLEM SOLVING Given: The load on the bent rod is supported by a smooth inclined surface at B and a collar at A. The collar is free to slide over the fixed inclined rod. Find: Support reactions at A and B. ME 214 Vector Statics

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Unformatted text preview: Lecture 13, Chapter 5.5-5.7 Instructor: A Rezaei Today’s Objective: Students will be able to: Students will be able to: a) Identify support reactions in 3-D and draw a free body diagram, and, b) apply the equations of equilibrium. SUPPORT REACTIONS IN 3-D EXAMPLE 1 Given: The cable of the tower crane is subjected to 840 N force. A fixed base at A supports the crane. Find: Reactions at the fixed base A. Problem 1 Draw the FBD for each pipe separately and each one alone. Problem 2 Draw the FBD for each object. Problem 3 Determine the vertical and horizontal reactions for the beam loaded as shown. Problem 4 Determine the tension in the cord and the reactions at A. Problem 5 The link shown in the figure is pin-connected and rests against a smooth support. Compute the horizontal and vertical reactions at A. Problem 6 Determine the tensions in cables BC and BD and the reactions at the ball-and –socket joint at...
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ME214StaticsChapter4Springl2007 - Lecture 13 Chapter...

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