Lecture_Notes_for_Sections_4.7_4.9

# Lecture_Notes_for_Sections_4.7_4.9 - EQUIVALENT SYSTEMS...

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EQUIVALENT SYSTEMS, RESULTANTS OF FORCE AND COUPLE SYSTEM, & FURTHER REDUCTION OF A FORCE AND COUPLE SYSTEM Today’s Objectives : Students will be able to: a) Determine the effect of moving a force. b) Find an equivalent force-couple system for a system of forces and couples. In-Class Activities : Check Homework Reading Quiz Applications Equivalent Systems System Reduction Concept Quiz Group Problem Solving Attention Quiz

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READING QUIZ 1. A general system of forces and couple moments acting on a rigid body can be reduced to a ___ . 1) single force. 2) single moment. 3) single force and two moments. 4) single force and a single moment. 2. The original force and couple system and an equivalent force-couple system have the same _____ effect on a body. 1) internal 2) external 3) internal and external 4) microscopic
APPLICATIONS What is the resultant effect on the person’s hand when the force is applied in four different ways ?

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APPLICATIONS (continued) Several forces and a couple moment are acting on this vertical section of an I-beam. | | ?? Can you replace them with just one force and one couple moment at point O that will have the same external effect? If yes, how will you do that?
AN EQUIVALENT SYSTEM (Section 4.7) = When a number of forces and couple moments are acting on a body, it is easier to understand their overall effect on the body if they are combined into a single force and couple moment having the same external effect The two force and couple systems are called equivalent systems since they have the same external effect on the body.

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MOVING A FORCE ON ITS LINE OF ACTION
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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_Sections_4.7_4.9 - EQUIVALENT SYSTEMS...

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