Lecture 18 sect 9.1

# Lecture 18 sect 9.1 - ME 221 Statics Lecture #18 Sections...

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ME 221 Lecture 18 1 ME 221 Statics Lecture #18 Sections 9.1 – 9.6

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ME 221 Lecture 18 2 Homework #7 Chapter 4 problems: Chapter 9 problems: 2, 3, 4, 11, 23, 29, 32 Due Friday, October 17
ME 221 Lecture 18 3 Exam #2 Results Average = xx.x Scores posted on Angel Solution will be posted on Angel today See syllabus for regrade policy Last day to drop without a grade reported is: Tuesday, October 14

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ME 221 Lecture 18 4 Second Moments of Area Second moments of area play a central role in mechanics of materials and dynamics Definition of second moment Basic areas (rectangle, circular, triangular) Definition of polar moment Basic areas (circular) Parallel axis theorem
ME 221 Lecture 18 5 Moments of Area Normally, we want the moment with respect to centriod axes Moment of inertia Moment about other axes derived from centroid case dA y x r 2 2 and xx yy A A I y dA I x dA = =

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## This note was uploaded on 07/25/2008 for the course ME 221 taught by Professor Buch during the Summer '08 term at Michigan State University.

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Lecture 18 sect 9.1 - ME 221 Statics Lecture #18 Sections...

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