General Physical Science
|
|
|
- Paula Palmer
- 8 years ago
- Views:
Transcription
1 General Physical Science Chapter 4 Work and Energy Work The work done by a constant force F acting upon an object is the product of the magnitude of the force (or component of the force) and the parallel distance d through which the object moves while the force is applied.??? W = F d 1
2 Work Scalar quantity Magnitude but no direction SI base unit = joule (J) Units are N-m N m or kg m 2 / s 2 English - ft-pound Work is against another force. Work Lifting apply a force against gravity W = F * d (Fd( Fd) F = mg Distance measured as height (against gravity) (h) W = mgh Work against friction constant velocity means net force = 0 Work Learning Goals Define work. List the units for work Questions: 1-51 Exercises: odd 2
3 Kinetic and Potential Energy Work done on an object changes stuff. Changes speed Changes height Produces heat All are changes in energy. Energy is the ability to do work Work by a system decreases energy. Work on a system increases energy. Work is the process by which energy is transferred from one object to another. Energy Work and energy have the same units! Many forms of energy Electrical Chemical Light many others Focus here is on mechanical energy. Mechanical Energy Two basic forms of mechanical energy Kinetic energy energy of motion E k = 1/2 mv 2 work done on a moving object, must calculate energy before and after, not just /\ v 3
4 School Zone Speed Limits Example A 1.0 kg ball is fired from a cannon. What is the change in the ball s s kinetic energy when it accelerates from 4.0 m/s to 8.0 m/s? Kinetic energy at 4.0 m/s E k = 1/2 m v 2 = 1/2 x 1.0 x = 8.0 J Example A 1.0 kg ball is fired from a cannon. What is the change in the ball s s kinetic energy when it accelerates from 4.0 m/s to 8.0 m/s? (E( k at 4.0 m/s = 8.0 J) Kinetic energy at 8.0 m/s = 1/2 (1.0) (8.0) 2 = 32 J Difference 32 J J = 24 J 4
5 Mechanical Energy Potential energy energy of position Assuming position in gravitational field, then potential energy is the mass times g times the height of the object. E p = mgh Work against gravity: /\E p = mg/\h Potential Energy Height is independent of the path used to obtain the height! Height (actually /\h) can be positive or negative. Other types of potential energy Spring Bow etc. Kinetic and Potential Energy Learning Goals Explain the relationship between work and energy. Define and distinguish kinetic and potential energies. Questions: Exercises: odd 5
6 Conservation of Energy The total energy of an isolated system remains constant. Conservation of mechanical energy (E k + E p ) t1 = (E( k + E p ) t2 (1/2 mv 2 + mgh) t1 = (1/2 mv 2 + mgh) t2 Example A 0.10 kg stone is dropped from a height of 10 m. What will the kinetic and potential energies of the stone be at 10.0 m, 7.0 m, 3.0 m, and 0.0 m. Be sure to neglect air resistance. At 10 m E p = mgh = (0.10)(9.8)(10.0) = 9.8 J E k = 0J; therefore total energy = 9.8J + 0J = 9.8J Example Total energy = 9.8J At 7.0 m E p = mgh = (0.10)(9.8)(7.0) = 6.9J E = E p + E k 9.8J = 6.9J + x x = 9.8J - 6.9J = 2.9J 6
7 Example Total energy = 9.8J At 3.0 m E p = mgh = (0.10)(9.8)(3.0) = 2.9J E = E p + E k 9.8J = 2.9J + x x = 9.8J - 2.9J = 6.9J Example Total energy = 9.8J At 0.0 m E p = mgh = (0.10)(9.8)(0.0) = 0.0J E = E p + E k 9.8J = x x = 9.8J - 0.0J = 9.8J Speed of Falling Object Potential energy is converted to kinetic energy 1/2 mv 2 = mg/\h v= 2g h 7
8 Conservation of Energy Learning Goals Explain the relationship between work and energy. Define and distinguish kinetic and potential energies. Questions: Exercises: 17, 19 Power Power is the time rate of doing work More power, more work for given time. More power, fixed amount of work in shorter time. P = W / t P = F d / t Units of power the watt. British horsepower Units summarized in Table 4.3 Example A constant force of 150 N is used to push a student s s motorcycle 10 m along a flat road in 20 s. Calculate the power in watts. F = 150 N; d = 10 m; t = 20 s P = F d / t P = (150)(10) / 20 = 75 W 8
9 Power Electric bill Kilowatt - hr Unit of energy E = P x t Table gives typical power consumption of typical household appliances. Power Learning Goals Define Power and it s s units. Distinguish between electrical power and electrical energy. Questions: Exercises: odd Forms of Energy and Consumption Must understand that all energy is conversion from one form to another! Heat energy Gravitational potential energy Electrical energy Chemical energy Radiant energy Nuclear energy 9
10 Conservation of Energy First law of Thermodynamics Energy cannot be created or destroyed The total amount of energy in the universe is constant Why doesn t t a pendulum keep swinging? Friction Changes the energy to heat energy Forms of Energy and Consumption Fossil fuels coal oil gas Alternative Fuels Hydroelectric Ethanol Wind Solar Steam generation Direct conversion (Solar cells) Forms of Energy and Consumption 10
11 Forms of Energy and Consumption Learning Goals Identify some common forms of energy Compare the main sources of energy and the main sources of energy consumption. List some alternative energy sources and explain their pros and cons. Questions: Alternative and Renewable Energy Sources Alternative energy sources NOT based on the burning of fossil fuels Renewable energy sources Cannot be exhausted Much overlap between the two Alternative/Renewable Sources Hydroelectric power Wind power Solar power Photovoltaic Geothermal Tides Biofuels Biomass 11
12 Alternative and Renewable Energy Sources Questions: Key Terms; Matching, Multiple Choice, and Fill-in in-the-blank Questions; Visual Connection and Applying your Knowledge General Physical Science Chapter 4 Work and Energy 12
In science, energy is the ability to do work. Work is done when a force causes an
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 is expressed in units of joules (J). A joule is calculated
Section 15.1 Energy and Its Forms (pages 446 452)
Section 15.1 and Its Forms (pages 446 452) This section describes how energy and work are related. It defines kinetic energy and potential energy, and gives examples for calculating these forms of energy.
Gravitational Potential Energy
Gravitational Potential Energy Consider a ball falling from a height of y 0 =h to the floor at height y=0. A net force of gravity has been acting on the ball as it drops. So the total work done on the
Name Class Date. You do twice as much work. b. You lift two identical books one meter above the ground.
Exercises 9.1 Work (pages 145 146) 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
Semester 2. Final Exam Review
Semester 2 Final Exam Review Motion and Force Vocab Motion object changes position relative to a reference point. Speed distance traveled in a period of time. Velocity speed in a direction. Acceleration
ch 15 practice test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
ch 15 practice test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Work is a transfer of a. energy. c. mass. b. force. d. motion. 2. What
Work and Energy. Work = Force Distance. Work increases the energy of an object. Energy can be converted back to work.
Work and Energy Ch. 6 Work = Force Distance Work increases the energy of an object. Energy can be converted back to work. Therefore, energy and work have the same unit: Newton meter = Nm Energy per gram,
At the skate park on the ramp
At the skate park on the ramp 1 On the ramp When a cart rolls down a ramp, it begins at rest, but starts moving downward upon release covers more distance each second When a cart rolls up a ramp, it rises
Chapter 6 Work and Energy
Chapter 6 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
Energy What is Energy? Energy is the ability to do work. Any object that has energy has the ability to create force. Energy is one of the fundamental building blocks of our universe. Energy appears in
Work, Energy and Power
Work, Energy and Power In this section of the Transport unit, we will look at the energy changes that take place when a force acts upon an object. Energy can t be created or destroyed, it can only be changed
Textbook pp. 148-153
Textbook pp. 148-153 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
physics 111N work & energy
physics 111N work & energy conservation of energy entirely gravitational potential energy kinetic energy turning into gravitational potential energy gravitational potential energy turning into kinetic
PS-6.2 Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
PS-6.1 Explain how the law of conservation of energy applies to the transformation of various forms of energy (including mechanical energy, electrical energy, chemical energy, light energy, sound energy,
8. Potential Energy and Conservation of Energy Potential Energy: When an object has potential to have work done on it, it is said to have potential
8. Potential Energy and Conservation of Energy Potential Energy: When an object has potential to have work done on it, it is said to have potential energy, e.g. a ball in your hand has more potential energy
WORK DONE BY A CONSTANT FORCE
WORK DONE BY A CONSTANT FORCE The definition of work, W, when a constant force (F) is in the direction of displacement (d) is W = Fd SI unit is the Newton-meter (Nm) = Joule, J If you exert a force of
Ch 7 Kinetic Energy and Work. Question: 7 Problems: 3, 7, 11, 17, 23, 27, 35, 37, 41, 43
Ch 7 Kinetic Energy and Work Question: 7 Problems: 3, 7, 11, 17, 23, 27, 35, 37, 41, 43 Technical definition of energy a scalar quantity that is associated with that state of one or more objects The state
9. The kinetic energy of the moving object is (1) 5 J (3) 15 J (2) 10 J (4) 50 J
1. If the kinetic energy of an object is 16 joules when its speed is 4.0 meters per second, then the mass of the objects is (1) 0.5 kg (3) 8.0 kg (2) 2.0 kg (4) 19.6 kg Base your answers to questions 9
Chapter 8: Potential Energy and Conservation of Energy. Work and kinetic energy are energies of motion.
Chapter 8: Potential Energy and Conservation of Energy Work and kinetic energy are energies of motion. Consider a vertical spring oscillating with mass m attached to one end. At the extreme ends of travel
Physics Notes Class 11 CHAPTER 6 WORK, ENERGY AND POWER
1 P a g e Work Physics Notes Class 11 CHAPTER 6 WORK, ENERGY AND POWER When a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force.
CHAPTER 6 WORK AND ENERGY
CHAPTER 6 WORK AND ENERGY CONCEPTUAL QUESTIONS. REASONING AND SOLUTION The work done by F in moving the box through a displacement s is W = ( F cos 0 ) s= Fs. The work done by F is W = ( F cos θ). s From
Work, Power, Energy Multiple Choice. PSI Physics. Multiple Choice Questions
Work, Power, Energy Multiple Choice PSI Physics Name Multiple Choice Questions 1. A block of mass m is pulled over a distance d by an applied force F which is directed in parallel to the displacement.
Using mechanical energy for daily
unit 3 Using mechanical energy for daily activities Physics Chapter 3 Using mechanical energy for daily activities Competency Uses mechanical energy for day-to-day activities Competency level 3.1 Investigates
Lesson 3 - Understanding Energy (with a Pendulum)
Lesson 3 - Understanding Energy (with a Pendulum) Introduction This lesson is meant to introduce energy and conservation of energy and is a continuation of the fundamentals of roller coaster engineering.
1. Nuclear - In YOUR OWN WORDS (not your partner s words) explain how this energy source works.
ENERGY RESOURCES ACTIVITY Integrated Science 4 Name: Date: Period: Directions: In groups, you will be going from station to station answering questions about differing energy resource. Each individual
Forms of Energy. Freshman Seminar
Forms of Energy Freshman Seminar Energy Energy The ability & capacity to do work Energy can take many different forms Energy can be quantified Law of Conservation of energy In any change from one form
3 Work, Power and Energy
3 Work, Power and Energy At the end of this section you should be able to: a. describe potential energy as energy due to position and derive potential energy as mgh b. describe kinetic energy as energy
Understanding and Measuring School Electronics
Understanding and Measuring School Electronics MATERIALS NEEDED: 1. 6 energy monitoring devices (note: these can be obtained from a variety of sources, i.e., local hardware stores, internet [average cost
10.1 Quantitative. Answer: A Var: 50+
Chapter 10 Energy and Work 10.1 Quantitative 1) A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 4.8 m above the ground. What is the mass
CANADA S RESOURCES: CONVENTIONAL AND ALTERNATIVE ENERGY
CANADA S RESOURCES: CONVENTIONAL AND ALTERNATIVE ENERGY Introduction Canadians are among the highest energy consumers in the world. Why? (list 3 possible reasons) Northern climate/very cold temperatures
Innovadidattica, Leggere e scrivere l'ambiente
Attenzione: l'allievo ha risposto usando il colore rosso. Allievo: Francesco B. 1. Read 1. Energy basics Energy is in everything. We use energy for everything we do, from making a jump shot to baking cookies
Work, Energy and Power Practice Test 1
Name: ate: 1. How much work is required to lift a 2-kilogram mass to a height of 10 meters?. 5 joules. 20 joules. 100 joules. 200 joules 5. ar and car of equal mass travel up a hill. ar moves up the hill
Work. Work = Force x parallel distance (parallel component of displacement) F v
Work Work = orce x parallel distance (parallel component of displacement) W k = d parallel d parallel Units: N m= J = " joules" = ( kg m2/ s2) = average force computed over the distance r r When is not
Work Energy & Power. September 2000 Number 05. 1. Work If a force acts on a body and causes it to move, then the force is doing work.
PhysicsFactsheet September 2000 Number 05 Work Energy & Power 1. Work If a force acts on a body and causes it to move, then the force is doing work. W = Fs W = work done (J) F = force applied (N) s = distance
Weight The weight of an object is defined as the gravitational force acting on the object. Unit: Newton (N)
Gravitational Field A gravitational field as a region in which an object experiences a force due to gravitational attraction Gravitational Field Strength The gravitational field strength at a point in
Module 7 Forms of energy generation
INTRODUCTION In rich countries like Australia, our standard of living is dependent on easily available energy. Every time you catch a bus, turn on a light or watch television energy is being used up. Over
Chapter 7 WORK, ENERGY, AND Power Work Done by a Constant Force Kinetic Energy and the Work-Energy Theorem Work Done by a Variable Force Power
Chapter 7 WORK, ENERGY, AND Power Work Done by a Constant Force Kinetic Energy and the Work-Energy Theorem Work Done by a Variable Force Power Examples of work. (a) The work done by the force F on this
12.5: Generating Current Electricity pg. 518
12.5: Generating Current Electricity pg. 518 Key Concepts: 1. Electrical energy is produced by energy transformations. 2. Electrical energy is produced from renewable and non-renewable resources. 4. Electrical
Work and Conservation of Energy
Work and Conservation of Energy Topics Covered: 1. The definition of work in physics. 2. The concept of potential energy 3. The concept of kinetic energy 4. Conservation of Energy General Remarks: Two
Potential / Kinetic Energy Remedial Exercise
Potential / Kinetic Energy Remedial Exercise This Conceptual Physics exercise will help you in understanding the Law of Conservation of Energy, and its application to mechanical collisions. Exercise Roles:
Energy Quiz. Questions:
Energy Quiz Want to have some fun and learn at the same time. This is not a test. You don t have to pass it and it won t give you a grade. It will just help you learn or find out how much you remember
KE =? v o. Page 1 of 12
Page 1 of 12 CTEnergy-1. A mass m is at the end of light (massless) rod of length R, the other end of which has a frictionless pivot so the rod can swing in a vertical plane. The rod is initially horizontal
What is Energy? What is the relationship between energy and work?
What is Energy? What is the relationship between energy and work? Compare kinetic and potential energy What are the different types of energy? What is energy? Energy is the ability to do work. Great, but
T E A C H E R S N O T E S
T E A C H E R S N O T E S Focus: Students explore energy: its sources, forms, and transformations. Students also consider the benefits of energy-efficient technologies and energy conservation. Learning
Exam 2 is at 7 pm tomorrow Conflict is at 5:15 pm in 151 Loomis
* By request, but I m not vouching for these since I didn t write them Exam 2 is at 7 pm tomorrow Conflict is at 5:15 pm in 151 Loomis There are extra office hours today & tomorrow Lots of practice exams
Measuring Electricity Class Activity
Measuring Electricity Class Activity Objective: To understand what energy is, how it impacts our daily lives, and how one can become an energy steward. Learning Outcomes: Students will: 1. Understand where
AP Physics - Chapter 8 Practice Test
AP Physics - Chapter 8 Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A single conservative force F x = (6.0x 12) N (x is in m) acts on
Curso2012-2013 Física Básica Experimental I Cuestiones Tema IV. Trabajo y energía.
1. A body of mass m slides a distance d along a horizontal surface. How much work is done by gravity? A) mgd B) zero C) mgd D) One cannot tell from the given information. E) None of these is correct. 2.
Introduction. So, What Is a Btu?
Introduction The way of life that we Americans take for granted every day depends upon a stable and abundant supply of affordable energy. Energy shortages can quickly affect our everyday lives and harm
Key Concepts What is mechanical energy? How do you calculate the amount of mechanical energy an object has?
Physics Outcome 2 Energy and Energy Transformations At the end of this section students will understand and calculate the two types of energy studied in Science 10, kinetic and potential energy This outcome
WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS
WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS 1. Stored energy or energy due to position is known as Potential energy. 2. The formula for calculating potential energy is mgh. 3. The three factors that
Do-Now. 1.) Get out notebook.
Do-Now 1.) Get out notebook. 2.) Answer the following questions on the first clean sheet in your notebook. 1.) What are renewable resources? 2.) What are nonrenewable resources? Alternative Sources of
Conservative vs. Non-conservative forces Gravitational Potential Energy. Work done by non-conservative forces and changes in mechanical energy
Next topic Conservative vs. Non-conservative forces Gravitational Potential Energy Mechanical Energy Conservation of Mechanical energy Work done by non-conservative forces and changes in mechanical energy
Chapter 6. Work and Energy
Chapter 6 Work and Energy The concept of forces acting on a mass (one object) is intimately related to the concept of ENERGY production or storage. A mass accelerated to a non-zero speed carries energy
Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
ch 7 and 16 review Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. 1. The heat released by a burning candle
5-Minute Refresher: RENEWABLE ENERGY
5-Minute Refresher: RENEWABLE ENERGY Renewable Energy Key Ideas Renewable energy is a source of energy that can be used and replenished naturally in a relatively short period of time. Non renewable energy
Chapter 2: Forms of Energy
Chapter 2: Forms of Energy Goals of Period 2 Section 2.1: To describe the forms of energy Section 2.2: To illustrate conversions from one form of energy to another Section 2.3: To define the efficiency
www.mathsbox.org.uk Displacement (x) Velocity (v) Acceleration (a) x = f(t) differentiate v = dx Acceleration Velocity (v) Displacement x
Mechanics 2 : Revision Notes 1. Kinematics and variable acceleration Displacement (x) Velocity (v) Acceleration (a) x = f(t) differentiate v = dx differentiate a = dv = d2 x dt dt dt 2 Acceleration Velocity
Name: Partners: Period: Coaster Option: 1. In the space below, make a sketch of your roller coaster.
1. In the space below, make a sketch of your roller coaster. 2. On your sketch, label different areas of acceleration. Put a next to an area of negative acceleration, a + next to an area of positive acceleration,
FIELD TRIP TO A POWER PLANT - A Reading Guide
TITLE: TOPIC: FIELD TRIP TO A POWER PLANT - A Reading Guide Energy and the sources of energy used in power plants GRADE LEVEL: Secondary CONTENT STANDARD: Earth and Space Science CONTENT OBJECTIVE: For
Physics 125 Practice Exam #3 Chapters 6-7 Professor Siegel
Physics 125 Practice Exam #3 Chapters 6-7 Professor Siegel Name: Lab Day: 1. A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the
Generating Current Electricity: Complete the following summary table for each way that electrical energy is generated. Pros:
P a g e 1 Generating Current Electricity: Complete the following summary table for each way that electrical energy is generated. Generating Electrical Energy Using Moving Water: Hydro-Electric Generation
Environmental Science 101 Energy. Web-Based Course. Lecture Outline: Terms You Should Know: Learning Objectives: Reading Assignment:
Environmental Science 101 Energy 1 Web-Based Course Lecture Outline: 5. RENEWABLE ENERGY RESOURCES MODULE 5.1 Improving Energy Efficiency A. Improving Energy Efficiency MODULE 5.2 Geothermal, Hydro and
MCQ - ENERGY and CLIMATE
1 MCQ - ENERGY and CLIMATE 1. The volume of a given mass of water at a temperature of T 1 is V 1. The volume increases to V 2 at temperature T 2. The coefficient of volume expansion of water may be calculated
Alternative Energy. Terms and Concepts: Relative quantities of potential energy resources, Solar constant, Economies of scale
Objectives Key Terms and Concepts Introduction Solar Wind Hydroelectric Power Geothermal Sources Biofuels Summary: Economies of Scale Questions for the video if time permits Alternative Energy Objectives:
Unit 3 Work and Energy Suggested Time: 25 Hours
Unit 3 Work and Energy Suggested Time: 25 Hours PHYSICS 2204 CURRICULUM GUIDE 55 DYNAMICS Work and Energy Introduction When two or more objects are considered at once, a system is involved. To make sense
PHYS 101 Lecture 10 - Work and kinetic energy 10-1
PHYS 101 Lecture 10 - Work and kinetic energy 10-1 Lecture 10 - Work and Kinetic Energy What s important: impulse, work, kinetic energy, potential energy Demonstrations: block on plane balloon with propellor
Energy and Society. Professor Ani Aprahamian
Energy and Society Professor Ani Aprahamian Wednesday, September 14th Nieuwland Science Hall 123; 6 pm - 7pm Dr. Peter Burns - "Nuclear Energy: Past Mistakes, Current Challenges, Future Prospects" Thursday,
Practice final for Basic Physics spring 2005 answers on the last page Name: Date:
Practice final for Basic Physics spring 2005 answers on the last page Name: Date: 1. A 12 ohm resistor and a 24 ohm resistor are connected in series in a circuit with a 6.0 volt battery. Assuming negligible
Chapter 2: Forms of Energy
Chapter 2: Forms of Energy Goals of Period 2 Section 2.1: To describe the forms of energy Section 2.2: To illustrate conversions from one form of energy to another Section 2.3 To describe energy storage
As you learned in the previous activity, energy is either potential energy or kinetic energy. Each can take many forms.
Topic 6: Forms of Potential Energy As you learned in the previous activity, energy is either potential energy or kinetic energy. Each can take many forms. Forms of potential energy include Stored Mechanical
Chapter 7: Momentum and Impulse
Chapter 7: Momentum and Impulse 1. When a baseball bat hits the ball, the impulse delivered to the ball is increased by A. follow through on the swing. B. rapidly stopping the bat after impact. C. letting
Lecture 07: Work and Kinetic Energy. Physics 2210 Fall Semester 2014
Lecture 07: Work and Kinetic Energy Physics 2210 Fall Semester 2014 Announcements Schedule next few weeks: 9/08 Unit 3 9/10 Unit 4 9/15 Unit 5 (guest lecturer) 9/17 Unit 6 (guest lecturer) 9/22 Unit 7,
BHS Freshman Physics Review. Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science.
BHS Freshman Physics Review Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science. Galileo (1564-1642): 1 st true scientist and 1 st person to use
4 Gravity: A Force of Attraction
CHAPTER 1 SECTION Matter in Motion 4 Gravity: A Force of Attraction BEFORE YOU READ After you read this section, you should be able to answer these questions: What is gravity? How are weight and mass different?
WindWise Education. 2 nd. T ransforming the Energy of Wind into Powerful Minds. editi. A Curriculum for Grades 6 12
WindWise Education T ransforming the Energy of Wind into Powerful Minds A Curriculum for Grades 6 12 Notice Except for educational use by an individual teacher in a classroom setting this work may not
C B A T 3 T 2 T 1. 1. What is the magnitude of the force T 1? A) 37.5 N B) 75.0 N C) 113 N D) 157 N E) 192 N
Three boxes are connected by massless strings and are resting on a frictionless table. Each box has a mass of 15 kg, and the tension T 1 in the right string is accelerating the boxes to the right at a
B) 286 m C) 325 m D) 367 m Answer: B
Practice Midterm 1 1) When a parachutist jumps from an airplane, he eventually reaches a constant speed, called the terminal velocity. This means that A) the acceleration is equal to g. B) the force of
Issue paper: Definition of primary and secondary energy
Issue paper: Definition of primary and secondary energy Prepared as input to Chapter 3: Standard International Energy Classification (SIEC) in the International Recommendation on Energy Statistics (IRES)
Chapter 13 Quiz. Multiple Choice Identify the choice that best completes the statement or answers the question.
Chapter 13 Quiz Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of the following is the correct type of energy utilized to produce tidal power? a.
310 Exam Questions. 1) Discuss the energy efficiency, and why increasing efficiency does not lower the amount of total energy consumed.
310 Exam Questions 1) Discuss the energy efficiency, and why increasing efficiency does not lower the amount of total energy consumed. 2) What are the three main aspects that make an energy source sustainable?
Energy transformations
Energy transformations Objectives Describe examples of energy transformations. Demonstrate and apply the law of conservation of energy to a system involving a vertical spring and mass. Design and implement
Alternative Energy Resources
Alternative Energy Resources Energy Resource Advantages Disadvantages What are some renewable energy resources? A nonrenewable resource cannot be replaced in a reasonable amount of time. Fossil fuels such
Science Standard Articulated by Grade Level Strand 5: Physical Science
Concept 1: Properties of Objects and Materials Classify objects and materials by their observable properties. Kindergarten Grade 1 Grade 2 Grade 3 Grade 4 PO 1. Identify the following observable properties
Electrical Charge: a type of energy that comes from the flow of charged particles; it allows electrical devices to function.
Unit E: Electrical Applications Chapter 11: Electrical Energy 11.1: Generating Electricity pg. 420 Key Concepts: 1. Electrical energy is generated using a variety of technologies. 2. Electrical energy
Energy - Key Vocabulary
Energy - Key Vocabulary Term Potential Energy Kinetic Energy Joules Gravity Definition The energy an object possesses due to its position. PE = mgh The energy an object possesses when it is in motion.
Lab 8: Ballistic Pendulum
Lab 8: Ballistic Pendulum Equipment: Ballistic pendulum apparatus, 2 meter ruler, 30 cm ruler, blank paper, carbon paper, masking tape, scale. Caution In this experiment a steel ball is projected horizontally
PHY231 Section 2, Form A March 22, 2012. 1. Which one of the following statements concerning kinetic energy is true?
1. Which one of the following statements concerning kinetic energy is true? A) Kinetic energy can be measured in watts. B) Kinetic energy is always equal to the potential energy. C) Kinetic energy is always
Indiana's Academic Standards 2010 ICP Indiana's Academic Standards 2016 ICP. map) that describe the relationship acceleration, velocity and distance.
.1.1 Measure the motion of objects to understand.1.1 Develop graphical, the relationships among distance, velocity and mathematical, and pictorial acceleration. Develop deeper understanding through representations
SIZE. Energy. Non-Mechanical Energy. Mechanical Energy. Part II. Examples of Non-Mechanical Energy. Examples of Mechanical Energy.
Energy Part II Non-Mechanical Energy Wait a minute if all energy is either kinetic or potential and TME = KE + PE then how can there possibly be such thing as non-mechanical energy!?!? Mechanical Energy
Multiple sources of energy will be available, giving the consumer choices. A Higher Percentage of Energy will come from renewable energy sources
Editor s comments: Numbers in parentheses indicate the number of duplicate or extremely similar comments made. The headings are editor s best attempt to draft vision statements reflecting the participants
Chapter 4 Forms of energy
Chapter 4 Forms of energy Introduction This chapter compromises a set of activities that focuses on the energy sources and conversion. The activities illustrate The concept and forms of energy; The different
Name Period WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS. 1. Stored energy or energy due to position is known as energy.
Name Period Date WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS 1. Stored energy or energy due to position is known as energy. 2. The formula for calculating potential energy is. 3. The three factors
Problem Set #8 Solutions
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics Department 8.01L: Physics I November 7, 2015 Prof. Alan Guth Problem Set #8 Solutions Due by 11:00 am on Friday, November 6 in the bins at the intersection
Lesson 39: Kinetic Energy & Potential Energy
Lesson 39: Kinetic Energy & Potential Energy Total Mechanical Energy We sometimes call the total energy of an object (potential and kinetic) the total mechanical energy of an object. Mechanical energy
UNIT 2 GCSE PHYSICS 2.2.1 Forces and Energy 2011 FXA WORK DONE (J) = ENERGY TRANSFERRED (J) WORK
29 When a force causes an object to move through a distance, work is done. Work done, force and distance are related by the equation : W = F x d WORK When a force is applied to an object and cause it to
Midterm Solutions. mvr = ω f (I wheel + I bullet ) = ω f 2 MR2 + mr 2 ) ω f = v R. 1 + M 2m
Midterm Solutions I) A bullet of mass m moving at horizontal velocity v strikes and sticks to the rim of a wheel a solid disc) of mass M, radius R, anchored at its center but free to rotate i) Which of
Chapter 9. particle is increased.
Chapter 9 9. Figure 9-36 shows a three particle system. What are (a) the x coordinate and (b) the y coordinate of the center of mass of the three particle system. (c) What happens to the center of mass
Exam on Heat and Energy
Exam on Heat and Energy True/False Indicate whether the statement is true or false. 1. Energy is the ability to cause change. 2. Energy is measured in joules. 3. When you ride a playground swing, your