chapter 4-4

# chapter 4-4 - EQUIVALENT FORCE-COUPLE SYSTEMS Today's...

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Lecture Notes for Sections 4.7-4.9 1 EQUIVALENT FORCE-COUPLE SYSTEMS Today’s Objectives : Students will be able to: 1) Determine the effect of moving a force. 2) Find an equivalent force-couple system for a system of forces and couples. In-Class Activities : Check homework, if any Reading quiz Applications Equivalent Systems System reduction Concept quiz Group problem solving Attention quiz READING QUIZ 1. A general system of forces and couple moments acting on a rigid body can be reduced to a ___ . A) single force. B) single moment. C) single force and two moments. D) 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. A) internal B) external C) internal and external D) microscopic

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Lecture Notes for Sections 4.7-4.9 2 APPLICATIONS What is the resultant effect on the person’s hand when the force is applied in four different ways ? 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? | | ??
Lecture Notes for Sections 4.7-4.9 3 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

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chapter 4-4 - EQUIVALENT FORCE-COUPLE SYSTEMS Today's...

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