Exercises. 9.1 Work (pages ) 9.2 Power (pages ) 9.3 Mechanical Energy (page 147)
|
|
|
- Suzan Angela Ferguson
- 5 years ago
- Views:
Transcription
1 Exercises 9.1 Work (pages ) 1. Circle the letter next to the correct mathematical equation for work. work = force distance work = distance force c. work = force distance d. work = force distance 2 2. You can use the equation in Question 1 to calculate work when the force is and the motion takes place in. 3. You do work if you lift a book one meter above the ground. How does the amount of work change in each of the following cases? You lift the book twice as high. You lift two identical books one meter above the ground. 4. Complete the table by naming the two general categories of work and giving an example of each. Category of Work Example 5. The unit of work is the. 6. Suppose that you apply a 50-N horizontal force to a 25-kg box, pushing the box 6 meters across the floor. How much work do you do on the box? 9.2 Power (pages ) 7. Power is the rate at which is done. 8. Power equals divided by. 9. The unit of power is the. 10. One megawatt (MW) equals watts. 11. In the United States, we customarily rate engines in units of, which is equivalent to kilowatt. 9.3 Mechanical (page 147) 12. Define energy. 13. What is the SI unit of energy? Conceptual Physics Reading and Study Workbook 67
2 14. Mechanical energy is the energy due to the or of something. 15. What are the two forms of mechanical energy? 9.4 Potential (pages ) 16. On each line, write elastic, chemical, or gravitational to identify the type of potential energy described. fossil fuels a compressed spring c. water in a reservoir d. a stretched rubber band e. food f. a bow drawn back g. electric batteries 17. The amount of gravitational potential energy possessed by an elevated object is equal to the work done against in lifting it. 18. What are two ways to calculate gravitational potential energy? height height 19. Explain what the height is when you calculate an object s gravitational potential energy. 20. How do hydroelectric power stations make use of gravitational potential energy? 9.5 Kinetic (page 150) 21. Kinetic energy is energy of. 22. Circle the letter for the equation you can use to find the kinetic energy of an object. KE = 2mv KE = 1 2 mv c. KE = 2mv 2 d. KE = 1 2 mv2 23. Kinetic energy equals the on an object multiplied by the distance the object moves. 24. Is the following sentence true or false? If the speed of an object doubles, the kinetic energy of the object also doubles. 68 Conceptual Physics Reading and Study Workbook
3 9.6 Work- Theorem (pages ) 25. Express the work-energy theorem. 26. Explain this equation: Work = KE. 27. Is the following sentence true or false? If you push against a heavy refrigerator, and it doesn t slide, then you are not doing work on the refrigerator. 28. Suppose you push against a box so that it moves across a horizontal surface. Explain how to determine the change in kinetic energy in each of the following cases. The surface has no friction. The surface has some friction. c. The box moves at a constant speed across a surface that has some friction. 29. Is the following sentence true or false? The maximum friction that the brakes of a car can supply is nearly the same whether the car moves slowly or quickly. Match each form of hidden kinetic energy with its description. Form of Kinetic Description 30. heat consists of molecules vibrating in rhythmic patterns 31. sound produced by electrons in motion 32. electricity c. results from random molecular motion 9.7 Conservation of (pages ) 33. The energy an arrow delivers to a target is slightly less than the energy it had when it was flying toward the target. What happened to the lost energy? 34. Express the law of conservation of energy. 35. The wound spring of a toy car has 10 J of potential energy. Only 8Jofthis energy changes to kinetic energy as the car moves. What happens to the remaining 2Jofenergy? Conceptual Physics Reading and Study Workbook 69
4 36. The figure above shows the energy of a swinging pendulum bob at different points along its path. If you ignore friction, how does the energy of the bob at the highest points of its path compare to the energy at the lowest point of its path? How does friction affect the pendulum? 37. The sun shines because some of its nuclear energy is transformed into energy. 38. In nuclear reactors, nuclear energy is transformed into. 39. Suppose a person in distress leaps from a burning building onto a firefighter s trampoline near the ground. Describe the change in potential energy, kinetic energy, and total energy as the person falls. Suppose the person has 10,000 J of potential energy just before jumping. What are the person s potential energy and kinetic energy upon reaching the trampoline? 9.8 Machines (pages ) 40. A machine is a device used to or. 41. Circle each letter that describes something a machine can do. puts out more energy than is put into it transfers energy from one place to another c. transforms energy from one form to another d. destroys or creates energy 42. Describe a lever. 43. Complete the following mathematical equation for a lever. ( ) input = ( ) output 44. The pivot point of a lever is called a. 70 Conceptual Physics Reading and Study Workbook
5 45. What are two ways to calculate the mechanical advantage of a machine? Type 1 Type 2 Type The figures above show three types of levers. Give an example of each type. Type 1: Type 2: c. Type 3: 47. Describe a pulley. 48. Complete the table about pulleys. Type of Pulley Single pulley with fixed axis Single pulley with movable axis System of pulleys Changes direction of the input force? Multiplies the input force? Mechanical Advantage 9.9 Efficiency (pages ) 49. Is the following sentence true or false? No real machine can be 100% efficient. 50. When a simple lever rocks about its fulcrum, or a pulley turns about its axis, a small fraction of input energy is converted into energy. 51. What are two ratios used to relate the efficiency of a machine to energy and work? 52. Suppose you put in 100 J of work on a lever and get out 93 J of work. What is the efficiency of the lever? How much of the work input is lost as heat? Conceptual Physics Reading and Study Workbook 71
6 53. Is the following sentence true or false? The lower the efficiency of a machine, the greater the amount of energy wasted as heat. 54. Which requires less force: sliding a load up an incline or lifting the load vertically? 55. The length of an incline is 8 m. The height of the elevated end is 2 m. Circle the letter of the inclined plane s theoretical mechanical advantage. 2 4 c. 8 d If the friction of an object against an inclined plane increases, the actual mechanical advantage and the efficiency. 57. What ratio can you use to relate the efficiency of a machine to its mechanical advantage? 58. The efficiency of a machine is always less than. 59. How can you convert efficiency to percent? 60. Is the following sentence true or false? An automobile engine is a complex machine that transforms mechanical energy into chemical energy for Life (page 160) 61. Most living organisms on this planet feed on various compounds that release energy when they react with. 62. Is the following sentence true or false? The amount of energy stored in gasoline is greater than the amount of energy in the products of its combustion. 63. Is the following sentence true or false? There is less energy stored in the molecules of food than there is in the reaction products after the food is metabolized. 64. How does the metabolism of food in the body compare to the burning of fossil fuels in mechanical engines? How are the processes different? 65. What makes life possible on Earth? 72 Conceptual Physics Reading and Study Workbook
7 9.11 Sources of (pages ) 66. is the source of practically all our energy on Earth. 67. Sunlight is directly transformed into electricity by. 68. Sequence the steps by which sunlight can be used indirectly to generate electricity. c. d. 69. Wind can be considered a type of solar power because wind is caused by. 70. Circle the letter of each correct statement about wind energy. Wind is a steady form of energy. Wind power can provide all of our energy needs. c. Wind can make a substantial contribution to the energy we use. d. Wind energy is practical when the energy is stored for future use. 71. Is the following sentence true or false? Hydrogen is a source of energy. 72. In a, hydrogen and oxygen gas are compressed at electrodes to produce water and electric current. 73. Earth s interior is kept hot by. 74. energy is held in underground reservoirs of hot water. Conceptual Physics Reading and Study Workbook 73
Lecture Outline. Chapter 7: Energy Pearson Education, Inc.
Lecture Outline Chapter 7: Energy This lecture will help you understand: Energy Work Power Mechanical Energy: Potential and Kinetic Work-Energy Theorem Conservation of Energy Machines Efficiency Recycled
Lecture Outline. Chapter 7: Energy Pearson Education, Inc.
Lecture Outline Chapter 7: Energy This lecture will help you understand: Energy Work Power Mechanical Energy: Potential and Kinetic Work-Energy Theorem Conservation of Energy Machines Efficiency Recycled
a. Change of object s motion is related to both force and how long the force acts.
0. Concept of Energy 1. Work. Power a. Energy is the most central concept underlying all sciences. Concept of energy is unknown to Isaac Newton. Its existence was still debated in the 1850s. Concept of
Energy can change from one form to another without a net loss or gain. 9.1 Work
Energy can change from one form to another without a net loss or gain. Energy may be the most familiar concept in science, yet it is one of the most difficult to define. We observe the effects of energy
9 Energy. Energy can change from one form to another without a net loss or gain.
Energy can change from one form to another without a net loss or gain. Energy may be the most familiar concept in science, yet it is one of the most difficult to define. We observe the effects of energy
Foundations of Physical Science. Unit 2: Work and Energy
Foundations of Physical Science Unit 2: Work and Energy Chapter 5: Work, Energy, and Power 5.1 Work 5.2 Energy Conservation 5.3 Energy Transformations Learning Goals Calculate the amount of work done by
Work. The quantity of work done is equal to the amount of force the distance moved in the direction in which the force acts.
Work The quantity of work done is equal to the amount of force the distance moved in the direction in which the force acts. Work falls into two categories: Work falls into two categories: work done against
Today. Finish Ch. 6 on Momentum Start Ch. 7 on Energy
Today Finish Ch. 6 on Momentum Start Ch. 7 on Energy Next three lectures (Sep 16, 20, 23) : Energy (Ch7) and Rotation (Ch.8) will be taught by Dr. Yonatan Abranyos, as I will be away at a research conference
Chapter 9 Conceptual Physics Study Guide
Name : Date: Period: Chapter 9 Conceptual Physics Study Guide Multiple Choice Identify the choice that best completes the statement or answers the question. 1. In physics, work is defined as a. force times
Clicker Question: Momentum. If the earth collided with a meteor that slowed it down in its orbit, what would happen: continued from last time
Momentum continued from last time If the earth collided with a meteor that slowed it down in its orbit, what would happen: A: It would maintain the same distance from the sun. B: It would fall closer in
Energy and Mechanical Energy
Energy and Mechanical Energy Energy Review Remember: Energy is the ability to do work or effect change. Usually measured in joules (J) One joule represents the energy needed to move an object 1 m of distance
gear gravity heat inclined plane
Equal and opposite forces which occur in pairs Upward force acting on objects when they are placed in water Substance which allows electric current to pass through it Force applied at one point of a machine
Chapter 6 Energy and Oscillations
Chapter 6 Energy and Oscillations Conservation of Energy In this chapter we will discuss one of the most important and fundamental principles in the universe. Energy is conserved. This means that in any
Name Class Date. 1. How much work (energy) is needed to lift an object that weighs 200 N to a height of 4 m?
Name Class Date Work and Energy Concept-Development Practice Page 9-1 1. How much work (energy) is needed to lift an object that weighs 200 N to a height of 4 m? 2. How much power is needed to lift the
Work & Energy. Chapter 4 pg
Work & Energy Chapter 4 pg 106-127 Today s Learning Objectives 1) Know the vocabulary of this chapter. 2) What is the two-pronged test to see if something qualifies as work? 3) Solve and calculate problems
Physics. Chapter 7 Energy
Physics Chapter 7 Energy Work How long does a force act? Last week, we meant time as in impulse (Ft) This week, we will take how long to mean distance Force x distance (Fd) is what we call WORK W = Fd
Energy can change from one form to another without a net loss or gain.
Energy can change from one form to another without a net loss or gain. Energy may be the most familiar concept in science, yet it is one of the most difficult to define. We observe the effects of energy
Energy Unit Test * Required
Energy Unit Test * Required 1. First and Last Name 2. Class Period 2nd 4th Forms of Energy Standard 6.PS3.1 Analyze the properties and compare sources of kinetic, elastic potential, gravitational potential,
Today: Chapter 7 -- Energy
Today: Chapter 7 -- Energy Energy is a central concept in all of science. We will discuss how energy appears in different forms, but cannot be created or destroyed. Some forms are more useful than others
Mechanical Energy Thermal Energy Chemical Energy Electrical Energy Electromagnetic Energy
Physical Science PHYSICS UNIT 4 Study Guide. Chapter 15 - Energy Key Terms Energy Kinetic Energy Potential Gravitational Potential Elastic Potential Mechanical Energy Thermal Energy Chemical Energy Electrical
WORK is. a FORCE is a push or a pull. when a FORCE moves an object. the ability to do WORK or cause change
ENERGY is the ability to do WORK or cause change Name 2 things that ARE energy or that HAVE energy WORK is when a FORCE moves an object a FORCE is a push or a pull There are two main kinds of energy POTENTIAL
Section 1 Work, Power, and Machines
Chapter 12 Work and Energy Section 1 Work, Power, and Machines Section 2 Simple Machines Section 3 What is Energy? Section 4 Conservation of Energy Skills Experiment Design SI Units and SI unit conversions
Energy "is an abstract concept invented by scientists in the nineteenth century to describe quantitatively a wide variety of natural phenomena.
Energy Energy "is an abstract concept invented by scientists in the nineteenth century to describe quantitatively a wide variety of natural phenomena." David Rose What is energy? Energy makes changes;
GPE = m g h. GPE = w h. k = f d. PE elastic = ½ k d 2. Work = Force x distance. KE = ½ m v 2
1 NAME PERIOD PHYSICS GUIDESHEET ENERGY CONVERSIONS POTENTIAL AND KINETIC ENERGY ACTIVITY LESSON DESCRIPTION SCORE/POINTS 1. NT CLASS OVERHEAD NOTES (5 pts/page) (Plus 5 pts/page for sample questions)
WORK, POWER, & ENERGY
WORK, POWER, & ENERGY In physics, work is done when a force acting on an object causes it to move a distance. There are several good examples of work which can be observed everyday - a person pushing a
Forms of Energy. What is energy? Energy is the amount of work that can be done by a force. What is a measure of energy? Joule.
Forms of Energy What is energy? Energy is the amount of work that can be done by a force. What is a measure of energy? Joule. Major Classes of Energy 1. Kinetic energy (E k ) is the work needed to accelerate
9 Energy. Ch 9 Energy. Be able to explain and calculate the work in and out of a machine. Identify and label three types of levers.
Ch 9 Energy Be able to explain and calculate the work in and out of a machine. Identify and label three types of levers. 9.1 Work Work is the product of the force on an object and the distance through
Energy: Forms and Changes
Energy: Forms and Changes Nature of Energy Energy is all around you! You can hear energy as sound. You can see energy as light. And you can feel it as wind. Nature of Energy You use energy when you: hit
WHAT IS ENERGY???? Energy can have many different meanings and. The ability of an object to do work. Measured in joules (J)
WHAT IS ENERGY???? Energy can have many different meanings and forms The ability of an object to do work Measured in joules (J) N m = J Work in Progress So what is are the different types of energy? DIFFERENT
Chapter 8 Energy Flow and Systems
Conceptual Physics/ PEP Name: Date: Chapter 8 Energy Flow and Systems Section Review 8.1 1. In an experiment, you learn that the total energy at the end is a little less than it was at the beginning. Explain
Section 1: Work, Power, and Machines. Preview Key Ideas Bellringer What Is Work? Math Skills Power Machines and Mechanical Advantage
Section 1 Section 1: Work, Power, and Machines Preview Key Ideas Bellringer What Is Work? Math Skills Power Machines and Mechanical Advantage Section 1 Key Ideas How is work calculated? What is the relationship
Chapter 10-Work, Energy & Power
DULLES HIGH SCHOOL Chapter 10-Work, Energy & Power Energy Transformations Judy Matney 1/12/2016 In this chapter, we will study the concepts of force and work; we will understand the transformations of
IGCSE Double Award Extended Coordinated Science
IGCSE Double Award Extended Coordinated Science Physics 3.1 & 3.3 & 3.4 - Energy, Work, and Power Energy, Work, and Power You need to know what energy, work, and power is, and the units for energy and
Energy and Work ASSIGNMENT EDULABZ
Energy and Work ASSIGNMENT 1. Fill in the blank spaces by choosing the correct words from the list given below : List : created, constant, destroyed, work, force, mechanical energy, displacement, K.E.,
Healy/DiMurro. Vibrations 2016
Name Vibrations 2016 Healy/DiMurro 1. In the diagram below, an ideal pendulum released from point A swings freely through point B. 4. As the pendulum swings freely from A to B as shown in the diagram to
General Physics I Work & Energy
General Physics I Work & Energy Forms of Energy Kinetic: Energy of motion. A car on the highway has kinetic energy. We have to remove this energy to stop it. The brakes of a car get HOT! This is an example
Momentum, Impulse, Work, Energy, Power, and Conservation Laws
Momentum, Impulse, Work, Energy, Power, and Conservation Laws 1. Cart A has a mass of 2 kilograms and a speed of 3 meters per second. Cart B has a mass of 3 kilograms and a speed of 2 meters per second.
Momentum, Impulse, Work, Energy, Power, and Conservation Laws
Momentum, Impulse, Work, Energy, Power, and Conservation Laws 1. Cart A has a mass of 2 kilograms and a speed of 3 meters per second. Cart B has a mass of 3 kilograms and a speed of 2 meters per second.
Unit 5: Energy (Part 2)
SUPERCHARGED SCIENCE Unit 5: Energy (Part 2) www.sciencelearningspace.com Appropriate for Grades: Lesson 1 (K-12), Lesson 2 (K-12) Duration: 6-15 hours, depending on how many activities you do! We covered
Work and Energy. Work
Work and Energy Objectives: Students will define work. Students will define and give examples of different forms of energy. Students will describe and give examples of kinetic energy and potential energy.
Chapter 7 Energy and Machines Unit Test - Ms. Nechita
hapter 7 Energy and Machines Unit Test - Ms. Nechita Your Name: Printed Feb 26, 2015 03:12 PM Question #1 of 38 1 pt - Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the
The Story of Energy. Forms and Functions
The Story of Energy Forms and Functions What are 5 things E helps us do? Batteries store energy! This car uses a lot of energy Even this sleeping puppy is using stored energy. We get our energy from FOOD!
Ch 11 ENERGY and its CONSERVATION. work causes a change in the energy of a system KE (an increase or decrease in KE) ket.
Ch 11 ENERGY and its CONSERVATION 11.1 The Many Forms of Energy work causes a change in the energy of a system W = KE (an increase or decrease in KE) work energy theorem object + work object work increase
Do Now: What does it mean when you say That person has a lot of energy?
Do Now: What does it mean when you say That person has a lot of energy? ENERGY What have we learned so far? 1. Work is done on an object when a force acts in the direction the object is moving. 2. When
Physics Test 9: Work and Energy page 1
Name Physics Test 9: Work and Energy page 1 Multiple Choice Read each question and choose the best answer by putting the corresponding letter in the blank to the left. 1. Which of the following is a unit
WORK, POWER, & ENERGY
WORK, POWER, & ENERGY In physics, work is done when a force acting on an object causes it to move a distance. There are several good examples of work which can be observed everyday - a person pushing a
ΣE before ± W = ΣE after
The Law of Conservation of Energy The Law of Conservation of Energy states: Energy is never created nor destroyed just transformed into other forms of energy. OR ΣE before = ΣE after Yet if energy is added
Old Exam. Question Chapter 7 072
Old Exam. Question Chapter 7 072 Q1.Fig 1 shows a simple pendulum, consisting of a ball of mass M = 0.50 kg, attached to one end of a massless string of length L = 1.5 m. The other end is fixed. If the
WORK, POWER & ENERGY
WORK, POWER & ENERGY Work An applied force acting over a displacement. The force being applied must be parallel to the displacement for work to be occurring. Work Force displacement Units: Newton meter
Power: Sources of Energy
Chapter 5 Energy Power: Sources of Energy Tidal Power SF Bay Tidal Power Project Main Ideas (Encyclopedia of Physics) Energy is an abstract quantity that an object is said to possess. It is not something
pg B7. A pendulum consists of a small object of mass m fastened to the end of an inextensible cord of length L. Initially, the pendulum is dra
pg 165 A 0.20 kg object moves along a straight line. The net force acting on the object varies with the object's displacement as shown in the graph above. The object starts from rest at displacement x
Physics Unit: Force & Motion
Physics Unit: Force & Motion What is physical science? A. Physical science is a field of science that studies matter and energy. B. Physical science has 2 main branches: 1. PHYSICS: the study of how matter
The Story of Energy. Forms and Functions
The Story of Energy Forms and Functions What are 5 things E helps us do? Batteries store energy! This car uses a lot of energy Even this sleeping puppy is using stored energy. We get our energy from FOOD!
Name 09-MAR-04. Work Power and Energy
Page 1 of 16 Work Power and Energy Name 09-MAR-04 1. A spring has a spring constant of 120 newtons/meter. How much potential energy is stored in the spring as it is stretched 0.20 meter? 1. 2.4 J 3. 12
4.) A baseball that weighs 1.6 N leaves a bat with a speed of 40.0 m/s. Calculate the kinetic energy of the ball. 130 J
AP Physics-B Energy And Its Conservation Introduction: Energy is a term that most of us take for granted and use quite freely. We assume we know what we are talking about when speaking of energy. In truth,
Work Forms of Energy Power Conservation of Energy Kepler s Laws of Motion Simple Machines Mechanical Advantage
Energy LCHS Work Forms of Energy Power Conservation of Energy Kepler s Laws of Motion Simple Machines Mechanical Advantage machine energy lever friction mechanical advantage input force mechanical system
Broughton High School of Wake County
Physical Science Vocabulary Vocabulary for Chapter 4 No.# Term Page # Mechanical Energy Elastic Potential Energy Joule Potential Energy Definition Kinetic Energy Formula Law of Conservation of energy Chemical
Name Period Date. D) density. E) speed.
Pre-Test - Post-Test 1. In physics, work is defined as. A) force divided by time. B) force times distance. C) distance divided by time. D) force times time. E) force divided by distance. 2. Potential energy
1 1. A spring has a spring constant of 120 newtons/meter. How much potential energy is stored in the spring as it is stretched 0.20 meter?
Page of 3 Work Power And Energy TEACHER ANSWER KEY March 09, 200. A spring has a spring constant of 20 newtons/meter. How much potential energy is stored in the spring as it is stretched 0.20 meter?. 2.
UNIT 5: WORK and ENERGY RECORD ALL ANSWERS ON ANSWER SHEET.
PHYSICAL SCIENCE UNIT 5: WORK and ENERGY RECORD ALL ANSWERS ON ANSWER SHEET. name 1. Which of the following processes requires the most work? a. A 10 kg weight rests on a table. b. A person holds a 1 kg
produce sugar, which contains stored chemical energy. Most of the energy that we use on Earth originally came from the Sun.
Conservation of Energy Energy can be in many different forms. Students should know sources and properties of the following forms of energy: Heat energy is the transfer of thermal energy (energy that is
Table of Contents. Chapter: Energy. Section 1: The Nature of Energy. Section 2: Conservation of Energy
Table of Contents Chapter: Energy Section 1: The Nature of Energy Section 2: 1 The Nature of Energy What is energy? Wherever you are sitting as you read this, changes are taking place lightbulbs are heating
WORK & ENERGY. Work W = Fdcosα 1. A force of 25.0 Newtons is applied so as to move a 5.0 kg mass a distance of 20.0 meters. How much work was done?
PHYSICS HOMEWORK #41 Work W = Fdcosα 1. A force of 25.0 Newtons is applied so as to move a 5.0 kg mass a distance of 20.0 meters. How much work was done? 2. A force of 120 N is applied to the front of
W = F Δx or W = F Δx cosθ
WORK AND ENERGY When a force acts upon an object to cause a displacement of the object, it is said that work was done upon the object. In order for a force to qualify as having done work on an object,
CHAPTER 13.3 AND 13.4 ENERGY
CHAPTER 13.3 AND 13.4 ENERGY Section 13.3 Energy Objective 1: What is the relationship between energy and work? Objective 2: Identify the energy of position. Objective 3: The factors that kinetic energy
Question 3 (1 point) A rubber band stretched as far as it will go (without breaking) is a good example of an equilibrium position. a. True b.
Name: Schoology Review Question 1 (1 point) Which answer best describes elastic potential energy? a. Elastic potential energy refers to the rigidity of an elastic material. b. Elastic potential energy
In an avalanche, a mass of loose snow, soil, or rock suddenly gives way and slides down the side of a mountain.
ENERGY Energy Objective 1: What is the relationship between energy and work? Objective 2: Identify the energy of position. Objective 3: The factors that kinetic energy depends on Objective 4: What is non-mechanical
PHYSICS GUIDESHEET UNIT 5. - ENERGY SUBUNIT - ENERGY CONVERSIONS POTENTIAL AND KINETIC ENERGY ACTIVITY LESSON DESCRIPTION SCORE/POINTS
1 NAME PERIOD PHYSICS GUIDESHEET UNIT 5. - ENERGY SUBUNIT - ENERGY CONVERSIONS POTENTIAL AND KINETIC ENERGY ACTIVITY LESSON DESCRIPTION SCORE/POINTS 1. NT CLASS OVERHEAD NOTES (5 pts/page) /20 (Plus 5
Simple machines. ( Fxd) input. = (Fxd) output
Announcements l LON-CAPA #5 and Mastering Physics Chapters 15 and 18 due Tuesday Feb. 18 l Average for exam 1 is 28/40 l The course will be graded on a curve with the average about 3.0, so if you received
2 possibilities. 2.) Work is done and... 1.) Work is done and... *** The function of work is to change energy ***
Work-Energy Theorem and Energy Conservation *** The function of work is to change energy *** 2 possibilities 1.) Work is done and... or 2.) Work is done and... 1 EX: A 100 N box is 10 m above the ground
s_3x03 Page 1 Physics Samples
Physics Samples KE, PE, Springs 1. A 1.0-kilogram rubber ball traveling east at 4.0 meters per second hits a wall and bounces back toward the west at 2.0 meters per second. Compared to the kinetic energy
Momentum. Momentum. Momentum Momentum = mass velocity or Momentum = mass speed (when direction is unimportant) Momentum = mv. Impulse.
Momentum Hewitt/Lyons/Suchocki/Yeh Conceptual Integrated Science Chapter 4 MOMENTUM AND ENERGY Momentum is inertia in motion defined as the product of mass and velocity: momentum: p = mv Momentum Momentum
WORK & ENERGY Work Work Energy Thm. Kinetic Energy Power Potential Energy Conservation of Energy
WORK & ENERGY Work Work Energy Thm. Kinetic Energy Power Potential Energy Conservation of Energy WORK & ENERGY Work: Transfer of energy through motion Energy: Ability to cause Change Kinetic Energy: Energy
Physics Year 11 Term 1 Week 7
Physics Year 11 Term 1 Week 7 Energy According to Einstein, a counterpart to mass An enormously important but abstract concept Energy can be stored (coal, oil, a watch spring) Energy is something moving
Work and Energy Chapter 4 and 5
Section 1 Work and Energy Chapter 4 and 5 Motion Read Chapter 4 pages 100 121 and Chapter 5 pages: 126-153 Objectives: - Distinguish between kinetic and potential energy; calculate kinetic energy, describe
WORK, POWER, & ENERGY
WORK, POWER, & ENERGY In physics, work is done when a force acting on an object causes it to move a distance. There are several good examples of work which can be observed everyday - a person pushing a
is energy in particles of matter. Chemical energy can be released, for example in or, when these particles react to form new substances.
TYPES OF ENERGY Energy can be in many different. Students should know sources and properties of the following forms of energy: is the transfer of energy (energy that is associated with the of the particles
Check out Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
Name: Mr. Willis Conceptual Physics: Date: Unit IV Work, Power, and Machines Need extra help? Check out http://www.bayhicoach.com Unit IV Study Guide Multiple Choice Identify the letter of the choice that
7.6(B) distinguish between physical and chemical changes in matter in the digestive system; and
7.6(B) distinguish between physical and chemical changes in matter in the digestive system; and 7.7(B) illustrate the transformation of energy within an organism such as the transfer from chemical energy
The content contained in all sections of chapter 6 of the textbook is included on the AP Physics B exam.
WORK AND ENERGY PREVIEW Work is the scalar product of the force acting on an object and the displacement through which it acts. When work is done on or by a system, the energy of that system is always
What is energy? Ability to do work (change)
What is energy? Ability to do work (change) Remember the forms of energy! 1. Thermal Energy motion of energy in the particles of matter due to more/less heat. (Heat energy = when thermal energy is transferred)
Elastic Potential Energy
Elastic Potential Energy If you pull on a spring and stretch it, then you do work. That is because you are applying a force over a displacement. Your pull is the force and the amount that you stretch the
The image below shows a student before and after a bungee jump.
CHANGES IN ENERGY Q1. The image below shows a student before and after a bungee jump. The bungee cord has an unstretched length of 20 m. (a) For safety reasons, it is important that the bungee cord used
Lecture Notes (Work & Energy)
Lecture Notes (Work & Energy) Intro: - one of the most central concepts in science is energy; the combination energy and matter makes up our universe - matter is the substance of the universe, while energy
Broughton High School
1 Physical Science Vocabulary Vocabulary for Chapter 5 - Work and Machines No.# Term Page # Definition 2 1. Compound Machine 2. Efficiency 3. Inclined Plane 4. Input force 5. Lever 6. Machine 7. Mechanical
15.1 Energy and Its Forms. Energy and Work. How are energy and work related? Energy is the ability to do work. Work is a transfer of energy.
Energy and Work How are energy and work related? Energy is the ability to do work. Work is a transfer of energy. Energy and Work Energy has different forms. A. The sun gives off energy in the form of heat
- Conservation of Energy Notes Teacher Key -
NAME: DATE: PERIOD: PHYSICS - Conservation of Energy Notes Teacher Key - - Is Energy Conserved? - Determine the max height that a 5kg cannonball will reach if fired vertically with an initial velocity
Energy: Forms and Changes
Energy: Forms and Changes The Energy Story Nature of Energy Energy is all around you! l You can hear energy as sound. l You can see energy as light. l And you can feel it as wind. Nature of Energy You
Energy, Work, and Power
Matthew W. Milligan, Work, and Power Conservation Laws an Alternative to Newton s Laws Matthew W. Milligan, Work, and Power I. - kinetic and potential - conservation II. Work - dot product - work-energy
Chapter 11. Using Energy. PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition Pearson Education, Inc.
Chapter 11 Using Energy PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition 11 Using Energy Slide 11-2 Slide 11-3 Slide 11-4 Slide 11-5 Reading Quiz 1. A machine uses 1000 J of
Energy Storage and Transfer Model: Review Sheet
Name Energy Storage and Transfer Model: Review Sheet Date Pd 1. A softball (m = 180 g) traveling at 22.3 m/s moves a fielder's glove backward 25 cm when the ball is caught. a. Construct an energy bar graph
Kinetic and Potential Energy. Supplemental Text Material Pages
Kinetic and Potential Energy Supplemental Text Material Pages 326-333 Work Transference of Energy Work = Force x distance W=Fd Work Lifting load against the force of the weight of the object Twice the
Topic 2: Mechanics 2.3 Work, energy, and power
Essential idea: The fundamental concept of energy lays the basis upon which much of science is built. Nature of science: Theories: Many phenomena can be fundamentally understood through application of
l Every object in a state of uniform motion tends to remain in that state of motion unless an
Motion and Machine Unit Notes DO NOT LOSE! Name: Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another.
Lesson 4 Momentum and Energy
Lesson 4 Momentum and Energy Introduction: Connecting Your Learning The previous lessons concentrated on the forces that cause objects to change motion. Lesson 4 will introduce momentum and energy, as
Unit 10: Work and Energy. * When the object moves, it must move in the same direction as the force for there to be work.
Work: Occurs as a force is applied over a distance. Ex: *It is a vector. (Has a number and direction) Unit 10: Work and Energy *If there is no movement, there is no work on that object. * When the object
What is Energy? In science, energy is the ability to do work. Work is done when a force causes an object to move in the direction of the force.
What is Energy? In science, energy is the ability to do work. Work is done when a force causes an object to move in the direction of the force. Energy Energy is the ability to do work. (reminder=what is
Lesson 8: Work and Energy
Name Period Lesson 8: Work and Energy 8.1 Experiment: What is Kinetic Energy? (a) Set up the cart, meter stick, pulley, hanging mass, and tape as you did in Lesson 5.1. You will examine the distance and
Energy: Forms and Changes
Energy: Forms and Changes Nature of Energy Energy is all around you! You can hear energy as sound. You can see energy as light. And you can feel it as wind. Nature of Energy You use energy when you: hit
CPO Science Foundations of Physics
CPO Science Foundations of Physics Unit 4, Chapter 10 Chapter 9 Unit 4: Energy and Momentum Chapter 10 Work and Energy 10.1 Machines and Mechanical Advantage 10.3 Energy and Conservation of Energy Chapter