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
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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
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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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