1 / 10

ME 221 Statics Lecture #15 Section 4.5

ME 221 Statics Lecture #15 Section 4.5. Homework #5. Chapter 3 problems: 48, 51, 55, 57, 61, 62, 65, 71, 72 & 75 Due Today. Homework #6. Chapter 4 problems: 2, 4, 10, 11, 18, 24, 39, 42, 43 & 47 Must use integration methods to solve Due Wednesday, October 8. Quiz #4. Monday, October 6.

dunncharles
Download Presentation

ME 221 Statics Lecture #15 Section 4.5

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ME 221 Statics Lecture #15Section 4.5 Lecture 15

  2. Homework #5 • Chapter 3 problems: • 48, 51, 55, 57, 61, 62, 65, 71, 72 & 75 • Due Today Homework #6 • Chapter 4 problems: • 2, 4, 10, 11, 18, 24, 39, 42, 43 & 47 • Must use integration methods to solve • Due Wednesday, October 8 Lecture 15

  3. Quiz #4 • Monday, October 6 Exam #2 • Friday, October 10 Lecture 15

  4. Last Lecture: • Centroids of Areas & Volumes 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 Lecture 15

  6. y A2 x2 A1 x1 A3 yc y2 = + + x y1 xc x3 y3 Area Centroids This case is representative of line and volume centroids. Divide total area into simple shapes (rectangles, semi-circles) Add up simple shapes Lecture 15

  7. A1 y A2 x2 x1 yc - = x y2 y1 xc May Also Use Subtraction Lecture 15

  8. Composite Centroid of an Area • Geometric center of the area • Summation of the pieces (holes are negative) • Where: Lecture 15

  9. Composite Centroid of a Volume • Geometric center of the volume • Average of the first moment over entire volume • Where: Lecture 15

  10. Examples Lecture 15

More Related