1. Unit 2: Energy Flow in Global Systems

2. Chapters: Chapter 4: Thermal Energy and Work Chapter 5: Energy and Motion Chapter 6: Efficiency

3. Chapter 4: Thermal Energy and Work

4. Assignment #2: Read Pages 142 – 149 Create a chart on the following inventors: The First Steam Engine(Thomas Savery) James Watt’s improvement of the Steam engine Steam Engines today (choose any engineer)

5. Include the following for each Inventor: – Background: when the inventor was born, where he lived etc – Rationale: outline the rationale or reasoning for developing his steam engine – Design: describe the design of his engine and how it works – Diagram: locate and include a diagram or a picture of the inventors steam engine – Benefits/Drawbacks: list the benefits and/or drawbacks to the design – Common Links: discuss how the development of the steam engine progressed from all three inventors and how they are

6. Work and Force: What is a Force? A push or a pull in any direction Measured in Newton’s Variable: F Unit: N

7. Work: What is Work? Work is a form of Energy Push or a Pull in the direction intended over a distance Measured in Joules Variable: W Unit: J (N x m)

8. Is Work Being Done?

10. Formula: Work = Force x distance W = Fd W = Joules (J) F = Newtons (N) d = distance (m) Re-Arrangement: F = Wd = W d F

11. Ex 1: You exert a force of 25 N on your textbook while lifting it a height of 1.4 m to put it on a shelf. How much work did you do on your textbook? Step 1: List VariablesStep 2: Choose Formula F = 25 NW = Fd d = 1.4m W = ? Step 3: Plug-in(with units)Step 4: Solve W = (25N)(1.4m)W = 35J

12. Rounding and Significant Figures: Rule: Your answer must have the same number as digits as the variable(in your question) with the LEAST amount of digits Refer to text page 492