PPT-Chapter 9 Relationships Between Industries: The forces moving us towards long-run equilibrium

Chapter 9 Summary of main points A competitive firm can earn positive or negative profit in the short run until entry or exit occurs In the long run competitive firms are condemned to earn only an average rate of return. On a post-it, write down anything you know about the word force or the different ways you use the word force.. Scientific Definition. A force is a . push . or a . pull. of an object.. When there is a force, one object is applying a force and on object is receiving the force.. 11.1: Forces change motion. 11.2: Force and mass determine acceleration. 11.3 Forces act in pairs. 11.4 Forces transfer momentum. Warm-up Questions (T or F). Speed includes direction, while velocity does not. Which one represents a liquid? Why?. Liquids have a definite . volume. , but not a definite . shape. . The particles are closer together than gases so the intermolecular forces are now a factor.. Liquids have a definite . CHAPTER 19. M. OSTMANN. 7. th. Grade Science. Kate Bond Middle School. WHAT IS A FORCE?. What causes these cyclists to move forward?. What prevents these cyclists from moving as fast as a race car?. Define . forces and different types of forces (push or pull). Measuring . forces in Newtons. Balanced . vs unbalanced forces. Inertia- . what is it and how does it apply to Newton’s first law of motion.. Chapter 6: Concurrent and Parallel Forces. (. Ewen. et al. 2005). Objectives:. Analyze equilibrium in one dimension.. Analyze concurrent forces using force diagrams.. Distinguish between compression and tension.. Newton. '. s . Laws. © 2016 Pearson Education, Inc.. Goals for Chapter 5. To draw free-body diagrams, showing forces on an individual object.. To solve for unknown quantities using Newton. '. s 2. nd. . . Example:. What is a force? . a) Strong . nuclear . force. b) Electromagnetic force. c) Weak force. d) Gravity.. EXAMPLE? an atom . #2) There are four forces that hold all matter together. 3) Gravitational forces . In-Class Activities. :. Reading Quiz. Applications. What, Why and How of a FBD. Equations of Equilibrium. Analysis of Spring and Pulleys. Concept Quiz. Group Problem Solving. Attention Quiz. Today’s Objectives. In-Class Activities. :. Check Homework. Reading Quiz. Applications. . Support Reactions. Free-Body Diagrams. Concept Quiz. Group Problem Solving. Attention Quiz. Today’s Objectives. :. Students will be able to:. (1) a book resting on a table, . (2) a hockey puck sliding with constant velocity across a frictionless surface, . (3) the rotating blades of a ceiling fan, and . (4) the wheel of a bicycle that is traveling along a straight path at constant speed. . EQUILIBRIUM. We have seen that objects in Physics fall into two categories: those that are . in equilibrium. , and those that are . not in equilibrium. .. EQUILIBRIUM. We have seen that objects in Physics fall into two categories: those that are in equilibrium, and those that are not in equilibrium. . Scalars and vectors. . Types of forces. . Resultant of forces. . Equilibrium of particles. Scalar and Vectors. . Scalar - . a physical quantity that is completely described by a real number. A particle is said to be in . equilibrium . if it remains at rest if originally at rest. , or . has a constant velocity if originally in motion. .. To maintain equilibrium, it is . necessary . to satisfy.