Lecture 17 Exam 2 - ME 221 Statics Lecture#19 Sections 9.1...

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ME 221 Lecture 17 1 ME 221 Statics Lecture #19 Sections 9.1 - 9.6 Exam #2 Review
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ME 221 Lecture 17 2 Homework #6 Chapter 4 problems: Due Today
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ME 221 Lecture 17 3 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 17 4 Exam 2 Friday, October 10 More on the exam later in the hour
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ME 221 Lecture 17 5 Moments of Area Characterizes the way area is distributed about the centroid Area Moment of Inertia (Second moment of an area) Always a positive value with units of in 4 , mm 4 , ft 4 , m 4 , etc. dA y x r 2 2 and xx yy A A I y dA I x dA = =
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ME 221 Lecture 17 6 Example dx dy x y x y dA=dxdy dI xx =y 2 dA dI yy =x 2 dA dx x y dA=(a-x)dy dI xx =y 2 dA dA=ydx dI yy =x 2 dA dx dy x y a use horizontal element for value in x use vertical element for value in y
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ME 221 Lecture 17 7 Moments of Basic Shapes
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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 17 Exam 2 - ME 221 Statics Lecture#19 Sections 9.1...

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