Lecture 15 sect 4.5

Lecture 15 sect 4.5 - (rectangles, semi-circles) Add up...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
ME 221 Lecture 15 1 ME 221 Statics Lecture #15 Section 4.5
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ME 221 Lecture 15 2 Homework #5 Chapter 3 problems: Due Today Homework #6 Chapter 4 problems: Must use integration methods to solve Due Wednesday, October 8
Background image of page 2
ME 221 Lecture 15 3 Quiz #4 Monday, October 6 Exam #2 Friday, October 10
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ME 221 Lecture 15 4 Last Lecture: Centroids of Areas & Volumes
Background image of page 4
ME 221 Lecture 15 5 Centroid of Composite Bodies Basic shapes are added together to get the composite centroid We look these up in Table 4.2 This table will be supplied on future exams Problems
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ME 221 Lecture 15 6 Area Centroids This case is representative of line and volume centroids. Divide total area into simple shapes
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: (rectangles, semi-circles) Add up simple shapes x y x c y c + + = x 3 y 3 A 3 y 2 x 2 A 2 y 1 x 1 A 1 ME 221 Lecture 15 7 May Also Use Subtraction x y x c y c =-y 2 x 2 A 2 y 1 x 1 A 1 ME 221 Lecture 15 8 Composite Centroid of an Area Geometric center of the area Summation of the pieces (holes are negative) Where: = i i i c A x A x 1 = i i i c A y A y 1 = i i A A ME 221 Lecture 15 9 Composite Centroid of a Volume Geometric center of the volume Average of the first moment over entire volume Where: = i i i c V x V x 1 = i i i c V y V y 1 = i i V V = i i i c V z V z 1 ME 221 Lecture 15 10 Examples...
View Full Document

Page1 / 10

Lecture 15 sect 4.5 - (rectangles, semi-circles) Add up...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online