1. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 1 Introduction to Technology and Engineering PVI Scientific Methodology, 2015-2016 Mr. Grodek DyKnow Lesson Scientific Methodology Chapter 9 Day 5

2. The Pillars of Lent Prayer Fasting Almsgiving For some good ideas: http://www.nicksenger.com/onecatholiclife/101-practical-fasting-ideas-for-lent-redux (Note: This slide is posted on my TeacherWeb site) ***And you are always invited to join me at PVI’s daily morning (7:10) Mass

3. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 1 Introduction to Technology and Engineering Today’s class objectives: - Start Learning Section 9.2 - Explain Rube Goldberg HW – including some cool videos - HW is due 2 class days from today Test CH 9 will be on Thurs 3/3 (P7,P8,P9,P1) / Fri 3/4 (P5) Class Objectives

4. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 1 Introduction to Technology and Engineering With Modifications By Mr. Grodek, PVI 9.1 9.2

5. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 1 Introduction to Technology and Engineering CHAPTER 9 Mechanical Engineering Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.  mechanics  inertia *  momentum  statics  dynamics  thermodynamics  turbine  hydraulics  mechanical advantage  pneumatics  simple machine  mechanism Need to know all of these With Modifications by Mr. Grodek, PVI 9.1 9.2 * vocab definition changed from glossary

6. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple Machines Examples of Simple Machines simple machine a tool that uses a basic power system to make work easier > The mechanical advantage (MA) of a simple machine is a mathematical expression of the way a machine multiplies the force put into it. mechanical advantage the increase in force gained by using a machine > Or, Wedge With Modifications by Mr. Grodek, PVI

7. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple MachinesWheel and Axle With Modifications by Mr. Grodek, PVI

8. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple MachinesInclined Plane With Modifications by Mr. Grodek, PVI The smaller the angle, the greater the MA Note: ADA requires a 12:1 slope

9. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple Machines Three Classes of Levers First-Class Lever Second- Class Lever Third- Class Lever TrebuchetWheelbarrowTweezers Lever With Modifications by Mr. Grodek, PVI

10. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple Machines Pulley There is no MA with one pulley by itself, but it does change the direction of force. MA is achieved with a combination of pulleys, known as “block-and-tackle”: With Modifications by Mr. Grodek, PVI

11. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple Machines Screw House Jack With Modifications by Mr. Grodek, PVI l is the lead, or the distance between the threads of the screw r is the radius of the screw, or length of an arm turning the screw

12. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Section 9.2 Machines and Mechanisms Simple MachinesWedge Wood Splitting Wedge With Modifications by Mr. Grodek, PVI

13. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 1 Introduction to Technology and Engineering Rube Goldberg Machine HW Assignment To get the idea of Rube Goldberg machines, let’s look at: 1) the official Rube Goldberg website http://www.rubegoldberg.com/ and classic comics and ideas in their Galleryhttp://www.rubegoldberg.com/ 2) the 4:05 minute MythBusters 2006 R.G. Christmas Machine video: http://www.youtube.com/watch?v=idiR_TLPAiY http://www.youtube.com/watch?v=idiR_TLPAiY 3) the 3:00 minute 2012 Coca-Cola commercial R.G. machine: http://www.youtube.com/watch?v=eQyYvPBrm5M http://www.youtube.com/watch?v=eQyYvPBrm5M 4) you probably also have played with Mouse Trap games – that’s Rube Goldberg too - show Corry Grodek video NOW, you are ready to do the Rube Goldberg worksheet provided in class for HW! **** Pay attention to the directions! PASS OUT HW WORKSHEET

14. Copyright © by The McGraw-Hill Companies, Inc. All rights reserved.Chapter 9 Mechanical Engineering Homework As always, for Homework, go to Mr. Grodek’s TeacherWeb web site, and click on Homework for your particular Section (P-#). HW (and testing plans, etc.) are normally posted by Sunday night for the entire week. http://teacherweb.com/VA/PaulVIHighSchool/MrGrodek/apt1.aspx http://teacherweb.com/VA/PaulVIHighSchool/MrGrodek/apt1.aspx Week of 29 Feb Due Wed 3/2 (P7,P8,P9,P1) / Thurs 3/3 (P5): Rube Goldberg Machine HW (worksheet and instructions provided in class) Due Thurs 3/3 (P7,P8,P9,P1) / Fri 3/4 (P5): Study for TEST CH 9 on Thurs 3/3 (P7,P8,P9,P1) / Fri 3/4 (P5) Due Fri 3/4 (P7,P8,P9) / Mon 3/7 (P1,P5): Read pgs. 184-197 (all of CH 10) Due Mon 3/7 (P7,P8) / Tues 3/8 (P9,P1,P5) Do a quick Internet research effort on Manufacturing Engineering at two or more websites of colleges/universities, manufacturing companies, or engineering/technical societies. TYPE ½ to 1-page (no more than 1 page!), no more than double-spaced, of your OWN words (NO cut-and-paste or quotations), describing what YOU think Manufacturing Engineering is, stating whether you do or do not think you would enjoy that career field, and why you think that way. Be sure to include the URLs of the websites you used. HEADS UP: We will finish CH 10 in a few days. There will be no quizzes in CH 10, only a Test.