unit 2, chapter 4 integrated science. unit two: work and energy 4.1 force and machines 4.2 the lever...
TRANSCRIPT
![Page 1: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/1.jpg)
Unit 2, Chapter 4
Integrated Science
![Page 2: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/2.jpg)
Unit Two: Work and Energy
4.1 Force and Machines
4.2 The Lever
4.3 Gears and Design
Chapter 4 Machines and Mechanical Systems
![Page 3: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/3.jpg)
Chapter 4 Learning Goals Describe and explain a simple machine. Apply the concepts of input force and output force to any machine. Determine the mechanical advantage of a machine. Construct and analyze a block and tackle machine. Describe the difference between science and engineering. Understand and apply the engineering cycle to the development of an
invention or product. Describe the purpose and construction of a prototype. Design and analyze a lever. Calculate the mechanical advantage of a lever. Recognize the three classes of levers. Build machines with gears and deduce the rule for how pairs of gears
turn. Design and build a gear machine that solves a specific problem.
![Page 4: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/4.jpg)
Chapter 4 Vocabulary Terms engineering gear
engineering cycle
engineers
force
fulcrum
gear
input
input arm
input force
input gear
lever machine mechanical advantage mechanical systems output output arm output force output gear prototype simple machine
![Page 5: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/5.jpg)
4.1 Forces in Machines
Key Question:
How do simple machines work?
*Read text section 4.1
AFTER Investigation 4.1
![Page 6: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/6.jpg)
4.1 Mechanical Advantage
MA = Fo
Fi
Output force (N)
Input force (N)
mechanicaladvantage
![Page 7: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/7.jpg)
![Page 8: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/8.jpg)
4.2 The Lever
Key Question:
How does a lever work?
*Read text section 4.2
AFTER Investigation 4.2
![Page 9: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/9.jpg)
![Page 10: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/10.jpg)
4.3 Gears and DesignKey Question:
How do gears work?
*Read text section 4.3
AFTER Investigation 4.3
![Page 11: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/11.jpg)
4.3 Gear Ratios
To = Ni
Ti No
Number of teethon input gearTurns of output gear
Turns of input gearNumber of teeth
on input gear
![Page 12: Unit 2, Chapter 4 Integrated Science. Unit Two: Work and Energy 4.1 Force and Machines 4.2 The Lever 4.3 Gears and Design Chapter 4 Machines and Mechanical](https://reader035.vdocuments.site/reader035/viewer/2022062516/56649dc75503460f94abbc2a/html5/thumbnails/12.jpg)
Machines