Example 2. Example 1. Example 4. Example 3. Kinetic Energy. Kinetic Energy 11/19/15
|
|
|
- Barnard Black
- 5 years ago
- Views:
Transcription
1 A tugboat pulls a ship with a constant net horizontal force of 5.00 x 10 3 N and causes the ship to move through a harbor. How much work is done on the ship if it moves a distance of 3.00 km? Example A weight lifter lifts a set of weights a vertical distance of.00 m. If a constant net force of 350 N is exerted on the weights, what is the net work done on the weights? A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 5 downward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 50.0 m length of aisle. If.0 J of work is done in raising a 180 g apple, how far is it lifted? Kinetic Energy Kinetic Energy (KE) is energy associated with an object that is in motion Kinetic energy depends on mass and the speed of that mass KE = 1/mv Kinetic Energy Kinetic Energy is known as the energy of motion. n KE = ½ mv If you double the mass, what happens to the kinetic energy? It doubles. If you double the velocity, what happens to the kinetic energy? It quadruples. Show units comparison 1
2 Calculate the speed of an 8.0 x 10 4 kg airliner with a kinetic energy of 1.1x10 9 J. Example What is the mass of a baseball if its kinetic energy is 109 J and it is traveling at 40 m/s? Kinetic Energy & Work Newton s nd Law of Motion (F net = ma) n v f v i = ad F net n Substituting for a: m F d n v f v i = net m n Multiplying both sides of the equation by ½ m n ½ mv f ½ mv i = F net d Kinetic Energy & Work The left side of the mathematical relationship is equal to the change in Kinetic Energy of the system. KE = ½ mv f ½ mv i The right side of the mathematical relationship is equal to the amount of Work done by the environment on the system. W = F net d Work Energy Theorem The Work-Energy Theorem states that the work done on an object is equal to its change in kinetic energy. ΔKE = W Note: this condition is true only when there is no friction. Work-Kinetic Energy Theorem Work-Kinetic Energy Theorem: the net work done on an object is equal to the change in the kinetic energy of the object Units: Joule (J) 1 Joule is equal to the amount of work done by a 1 Newton force over a displacement of 1 meter. 1 Nm 1 kg m /s
3 A student wearing frictionless in-line skates on a horizontal surface is pushed by a friend with a constant force of 45 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 35 J? Example A.0x10 3 kg car accelerates from rest under the actions of two forces. One is a forward force of 1140 N provided by traction between the wheels and the road. The other is a 950 N resistive force due to various frictional forces. Use the work-energy theorem to determine how far the car must travel for it s speed to reach.0 m/s. A.1x10 3 kg car starts from rest at the top of a driveway that is sloped at an angle of 0.0 with the horizontal. An average friction force of 4.0x10 3 N impedes the car s motion so that the car s speed at the bottom of the driveway is 3.8 m/s. What is the length of the driveway? A 75 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled is pushed a distance of 4.5 m starting from rest, its speed is 6.0 m/s. Find the magnitude of the net force on the bobsled. What is it? is measure of the amount of work done per unit of time. What are the units? Joule/second Watts P = W/t P = W / t OR since W = Fd we can say P = (Fd)/t since v = (d/t) we can say P= Fv is an alternative form of the power equation, and can be used to express instantaneous power when velocity is constant 3
4 11/19/15 Thought Question can also be converted to units of horsepower (hp) How many horses are in one horsepower? Note: 1 hp = 746 W coffee maker blender lawn mower Corvette Notes Example If Superman, at 90kg, jumps a 40m building in a single bound, how much work does Superman perform? If this occurs in 3s, what is his power output? Example A car with a mass of 1.50x103 kg starts from rest and accelerates to a speed of 18.0 m/s in 1.0 s. Assume that the force of resistance remains constant at N during this time. What is the average power developed by the car s engine? 0.75 hp 1.5 hp 5-6 hp 400 hp A 1.0x103 kg elevator carries a maximum load of kg. A constant frictional force of 4.0x103 N retards the elevator s motion upward. What minimum power, in kilowatts, must the motor deliver to lift the fully-loaded elevator at a constant speed of 3.00 m/s. A rain cloud contains.66x107 kg if water vapor. How long would it take for a.00 kw pump to raise the same amount of water to the cloud s altitude,.00 km? 4
5 How long does it take a 19 kw steam engine to do 6.8x10 7 J of work? 5
Objectives. Power in Translational Systems 298 CHAPTER 6 POWER
Objectives Explain the relationship between power and work. Explain the relationship between power, force, and speed for an object in translational motion. Calculate a device s efficiency in terms of the
Work Work has a variety of meanings (taking out the trash is hard work; the toaster doesn t work; Mom goes to work)
Physics Work, Power, and Energy Notes (Chapter 8 in Textbook) Key Terms Work Power Energy Potential Kinetic Mechanical Energy Law of Conservation of Energy Work-Energy Theorem Joule Watt Work Work has
Chapter 7 Kinetic Energy and Work
Prof. Dr. I. Nasser Chapter7_I 14/11/017 Chapter 7 Kinetic Energy and Work Energy: Measure of the ability of a body or system to do work or produce a change, expressed usually in joules or kilowatt hours
Lecture 9: Kinetic Energy and Work 1
Lecture 9: Kinetic Energy and Work 1 CHAPTER 6: Work and Kinetic Energy The concept of WORK has a very precise definition in physics. Work is a physical quantity produced when a Force moves an object through
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
WEP-Work and Power. What is the amount of work done against gravity as an identical mass is moved from A to C? J J J 4.
1. The work done in accelerating an object along a frictionless horizontal surface is equal to the change in the object s 1. momentum 2. velocity 3. potential energy 4. kinetic energy 2. The graph below
Slide. King Saud University College of Science Physics & Astronomy Dept.
Slide King Saud University College of Science Physics & Astronomy Dept. PHYS 103 (GENERAL PHYSICS) CHAPTER 7: ENERGY AND ENERGY TRANSFER LECTURE NO. 11 THIS PRESENTATION HAS BEEN PREPARED BY: DR. NASSR
An object moves back and forth, as shown in the position-time graph. At which points is the velocity positive?
1 The slope of the tangent on a position-time graph equals the instantaneous velocity 2 The area under the curve on a velocity-time graph equals the: displacement from the original position to its position
The relationship between force and distance has a name. WORK
EWP The relationship between force and distance has a name. WORK WORK - the product of the net force and distance through which an object moves in the direction of the net force. W=F d where W=work joules
Essentially, the amount of work accomplished can be determined two ways:
1 Work and Energy Work is done on an object that can exert a resisting force and is only accomplished if that object will move. In particular, we can describe work done by a specific object (where a force
AP Physics 1: MIDTERM REVIEW OVER UNITS 2-4: KINEMATICS, DYNAMICS, FORCE & MOTION, WORK & POWER
MIDTERM REVIEW AP Physics 1 McNutt Name: Date: Period: AP Physics 1: MIDTERM REVIEW OVER UNITS 2-4: KINEMATICS, DYNAMICS, FORCE & MOTION, WORK & POWER 1.) A car starts from rest and uniformly accelerates
Page 1. Name:
Name: 3834-1 - Page 1 1) If a woman runs 100 meters north and then 70 meters south, her total displacement is A) 170 m south B) 170 m north C) 30 m south D) 30 m north 2) The graph below represents the
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
Physics Chapter 5. Work and Energy
Physics Chapter 5 Work and Energy Work Work - (if force is constant) is the product of the force exerted on an object and the distance the object moves in the direction of the force. W = F d Work is a
Lectures Chapter 6 (Cutnell & Johnson, Physics 7 th edition)
PH 201-4A spring 2007 Work and Energy Lectures 16-17 Chapter 6 (Cutnell & Johnson, Physics 7 th edition) 1 Work and Energy: Work done by a constant force Constant pushing force F pointing in the same direction
Review. Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91
Review Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91 The unit of work is the A. Newton B. Watt C. Joule D. Meter E. Second 2/91 The unit of work is the A. Newton
KINETIC ENERGY AND WORK
Chapter 7: KINETIC ENERGY AND WORK 1 Which of the following is NOT a correct unit for work? A erg B ft lb C watt D newton meter E joule 2 Which of the following groups does NOT contain a scalar quantity?
Work and the Work-Energy Theorem
Work and Energy Click on the topic to go to that section Energy and the Work-Energy Theorem Work and Energy 2009 by Goodman & Zavorotniy Forces and Potential Energy Conservation of Energy Power Conservation
2. What would happen to his acceleration if his speed were half? Energy The ability to do work
1. A 40 kilogram boy is traveling around a carousel with radius 0.5 meters at a constant speed of 1.7 meters per second. Calculate his centripetal acceleration. 2. What would happen to his acceleration
PHYS 101 Previous Exam Problems. Kinetic Energy and
PHYS 101 Previous Exam Problems CHAPTER 7 Kinetic Energy and Work Kinetic energy Work Work-energy theorem Gravitational work Work of spring forces Power 1. A single force acts on a 5.0-kg object in such
Physics: Momentum, Work, Energy, Power
Name: ate: 1. The momentum of a 5-kilogram object moving at 6 meters per second is. 1 kg m/sec. 5 kg m/sec. 11 kg m/sec. 30 kg m/sec 2. 60-kilogram student running at 3.0 meters per second has a kinetic
Ch 8 Conservation of Energy
Ch 8 Conservation of Energy Cons. of Energy It has been determined, through experimentation, that the total mechanical energy of a system remains constant in any isolated system of objects that interact
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
Power is easily derived from the definition of work. We know that: P=Wt=FΔxcosθtin the case where F and Δx are in the same direction=fδxt=fδxt=fv
Power Now that we understand the relationship between work and energy, we are ready to look at a quantity related the rate of energy transfer. For example, a mother pushing a trolley full of groceries
Physics Worksheet Work and Energy Section: Name:
1. oncept of Energy a) Energy: quantity that is often understood as the on a physical system. b) We observe only the effects of energy when something is happening. When energy is being, or when energy
( ) = ( ) W net = ΔKE = KE f KE i W F. F d x. KE = 1 2 mv2. Note: Work is the dot product of F and d. Work-Kinetic Energy Theorem
Work-Kinetic Energy Theorem KE = 1 2 mv2 W F change in the kinetic energy of an object F d x net work done on the particle ( ) = ( ) W net = ΔKE = KE f KE i Note: Work is the dot product of F and d W g
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.
Chapter 4. Energy. Work Power Kinetic Energy Potential Energy Conservation of Energy. W = Fs Work = (force)(distance)
Chapter 4 Energy In This Chapter: Work Kinetic Energy Potential Energy Conservation of Energy Work Work is a measure of the amount of change (in a general sense) that a force produces when it acts on a
Lecture 7 Chapter 7 Work Energy Potential Energy Kinetic Energy
Lecture 7 Chapter 7 Work Energy Potential Energy Kinetic Energy Energy -- The money of physics Demo: Elastic Collisions Objects of equal mass exchange momentum in elastic collisions. 1 Demo: Blaster Balls
Momentum & Energy Review Checklist
Momentum & Energy Review Checklist Impulse and Momentum 3.1.1 Use equations to calculate impulse; momentum; initial speed; final speed; force; or time. An object with a mass of 5 kilograms is moving at
2. Kinetic friction - The force that acts against an object s motion. - Occurs once static friction has been overcome and object is moving
Section 2.14: Friction Friction is needed to move. Without friction, a car would sit in one spot spinning its tires, and a person would not be able to step forward. However, the motion of an object along
Work Done by a Constant Force
Work and Energy Work Done by a Constant Force In physics, work is described by what is accomplished when a force acts on an object, and the object moves through a distance. The work done by a constant
Chapter 6 Work, Energy, and Power. Copyright 2010 Pearson Education, Inc.
Chapter 6 Work, Energy, and Power What Is Physics All About? Matter Energy Force Work Done by a Constant Force The definition of work, when the force is parallel to the displacement: W = Fs SI unit: newton-meter
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
Sometimes (like on AP test) you will see the equation like this:
Work, Energy & Momentum Notes Chapter 5 & 6 The two types of energy we will be working with in this unit are: (K in book KE): Energy associated with of an object. (U in book PE): Energy associated with
WEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved
1. A 1-kilogram rock is dropped from a cliff 90 meters high. After falling 20 meters, the kinetic energy of the rock is approximately 1. 20 J 2. 200 J 3. 700 J 4. 900 J 2. If the speed of a car is doubled,
CHAPTER 6: IN AN ISOLATED SYSTEM, ENERGY IS TRANSFERRED FROM ONE OBJECT TO ANOTHER WHENEVER WORK IS DONE
CHAPTER 6: IN AN ISOLATED SYSTEM, ENERGY IS TRANSFERRED FROM ONE OBJECT TO ANOTHER WHENEVER WORK IS DONE 6.1 Work and Energy In science, work is done when a force acts over a displacement; energy is transferred.
Regents Physics. Physics Midterm Review - Multiple Choice Problems
Name Physics Midterm Review - Multiple Choice Problems Regents Physics 1. A car traveling on a straight road at 15.0 meters per second accelerates uniformly to a speed of 21.0 meters per second in 12.0
5. The graph represents the net force acting on an object as a function of time. During which time interval is the velocity of the object constant?
1. A 0.50-kilogram cart is rolling at a speed of 0.40 meter per second. If the speed of the cart is doubled, the inertia of the cart is A) halved B) doubled C) quadrupled D) unchanged 2. A force of 25
W = Fd. KE = 1 2 mv2
Ch 10 Energy, Work and Simple Machines work: moving an object in the direction of the force exerted upon it (Joules) work W = Fd force (Newtons) (meters) distance object is displaced in the direction of
Chapter 14 Learning Objectives-Study this for TEST. Chapter 14 Work and Power
Chapter 14 ork and Power GOAL: Students will be able to compare and contrast work and power qualitatively and quantitatively. Standard: SC.912.P.10.3 Students will: Level Scale 4 design and conduct experiments
velocity, force and momentum are vectors, therefore direction matters!!!!!!!
1 Momentum, p is mass times velocity: p = m v vector! unit: (p) = kg m/s Newton s second law: Force = time rate of change of momentum Net force F will produce change in momentum Δp of the object on which
D) No, because of the way work is defined D) remains constant at zero. D) 0 J D) zero
CHAPTER 6 REVIEW NAME 1) Can work be done on a system if there is no motion? A) Yes, if an outside force is provided. B) Yes, since motion is only relative. C) No, since a system which is not moving has
RELEASED. Go to next page. 2. The graph shows the acceleration of a car over time.
1. n object is launched across a room. How can a student determine the average horizontal velocity of the object using a meter stick and a calculator? The student can calculate the object s initial potential
(35+70) 35 g (m 1+m 2)a=m1g a = 35 a= =3.27 g 105
Coordinator: Dr. W. L-Basheer Monday, March 16, 2015 Page: 1 Q1. 70 N block and a 35 N block are connected by a massless inextendable string which is wrapped over a frictionless pulley as shown in Figure
1. A sphere with a radius of 1.7 cm has a volume of: A) m 3 B) m 3 C) m 3 D) 0.11 m 3 E) 21 m 3
1. A sphere with a radius of 1.7 cm has a volume of: A) 2.1 10 5 m 3 B) 9.1 10 4 m 3 C) 3.6 10 3 m 3 D) 0.11 m 3 E) 21 m 3 2. A 25-N crate slides down a frictionless incline that is 25 above the horizontal.
23. A snowmobile pulls a trailer with a force of 450 N while moving at a constant velocity of 15 m/s. How much work is done by the snowmobile in 28 s?
Physics 04 Unit Review (June 013) 1. Which represents the rate of work done? (A) efficiency (B) force (C) power (D) work. In which situation is work done on a box? (A) The box is at rest on a table. (B)
Physics 2111 Unit 7. Today s Concepts: Work & Kinetic Energy Power. Mechanics Lecture 7, Slide 1
Physics 2111 Unit 7 Today s Concepts: Work & Kinetic Energy Power Mechanics Lecture 7, Slide 1 Work-Kinetic Energy Theorem The work done by force F as it acts on an object that moves between positions
AP Physics I Summer Work
AP Physics I Summer Work 2018 (20 points) Please complete the following set of questions and word problems. Answers will be reviewed in depth during the first week of class followed by an assessment based
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.
Motor. Cable. Elevator
Q4.1 An elevator is being lifted at a constant speed by a steel cable attached to an electric motor. There is no air resistance, nor is there any friction between the elevator and the walls of the elevator
Momentum & Energy Review Checklist
Momentum & Energy Review Checklist Impulse and Momentum 3.1.1 Use equations to calculate impulse; momentum; initial speed; final speed; force; or time. An object with a mass of 5 kilograms is moving at
WS-CH-4 Motion and Force Show all your work and equations used. Isaac Newton ( )
AP PHYSICS 1 WS-CH-4 Motion and Force Show all your work and equations used. Isaac Newton (1643-1727) Isaac Newton was the greatest English mathematician of his generation. He laid the foundation for differential
Work Energy Review. 1. Base your answer to the following question on the information and diagram below and on your knowledge of physics.
Name: ate: 1. ase your answer to the following question on the information and diagram below and on your knowledge of physics. student pushes a box, weighing 50. newtons, 6.0 meters up an incline at a
1982B1. The first meters of a 100-meter dash are covered in 2 seconds by a sprinter who starts from rest and accelerates with a constant
1982B1. The first meters of a 100-meter dash are covered in 2 seconds by a sprinter who starts from rest and accelerates with a constant acceleration. The remaining 90 meters are run with the same velocity
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
S15--AP Q1 Work and Energy PRACTICE
Name: Class: Date: S15--AP Q1 Work and Energy PRACTICE Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Rupel pushes a box 5.00 m by applying a 25.0-N horizontal
AP Physics Work and Power Introduction: Work Performance Objectives: Textbook Reference: Questions And Problems:
AP Physics Work and Power Introduction: In everyday conversation the words work and power are used to describe many activities. In physics, the term work has a precise definition - it is not merely an
Base your answers to questions 5 and 6 on the information below.
1. A car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car during this 20.-second
Work done on an object = energy gained by the object Work done by an object = energy lost by the object
Energy Energy can be defined as the capacity for doing work, or the property of a system that diminishes when the system does work on any other system by an amount equal to the work done. 1) When work
Physics Unit 4:Work & Energy Name:
Name: Review and Preview We have come a long way in our study of mechanics. We started with the concepts of displacement and time, and built up to the more complex quantities of velocity and acceleration.
Exam 2--PHYS 101--Fall 2014
Class: Date: Exam 2--PHYS 101--Fall 2014 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Consider these vectors. What is A-B? a. a c. c b. b d. d 2. Consider
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
Chapter: The Laws of Motion
Table of Contents Chapter: The Laws of Motion Section 1: Newton s Second Law Section 2: Gravity Section 3: The Third Law of Motion 1 Newton s Second Law Force, Mass, and Acceleration Newton s first law
Chapter 4 Newton s Laws
Chapter 4 Newton s Laws Isaac Newton 1642-1727 Some inventions and discoveries: 3 laws of motion Universal law of gravity Calculus Ideas on: Sound Light Thermodynamics Reflecting telescope In this chapter,
Physics 111. Lecture 15 (Walker: 7.1-2) Work & Energy March 2, Wednesday - Midterm 1
Physics 111 Lecture 15 (Walker: 7.1-2) Work & Energy March 2, 2009 Wednesday - Midterm 1 Lecture 15 1/25 Work Done by a Constant Force The definition of work, when the force is parallel to the displacement:
act concurrently on point P, as shown in the diagram. The equilibrant of F 1
Page 1 of 10 force-friction-vectors review Name 12-NOV-04 1. A 150.-newton force, F1, and a 200.-newton force, F 2, are applied simultaneously to the same point on a large crate resting on a frictionless,
This chapter covers all kinds of problems having to do with work in physics terms. Work
Chapter 7 Working the Physics Way In This Chapter Understanding work Working with net force Calculating kinetic energy Handling potential energy Relating kinetic energy to work This chapter covers all
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
PHYSICS. Chapter 9 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT Pearson Education, Inc.
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 9 Lecture RANDALL D. KNIGHT Chapter 9 Work and Kinetic Energy IN THIS CHAPTER, you will begin your study of how energy is transferred
Chapter 7. Work and Kinetic Energy
Chapter 7 Work and Kinetic Energy P. Lam 7_16_2018 Learning Goals for Chapter 7 To understand the concept of kinetic energy (energy of motion) To understand the meaning of work done by a force. To apply
ENERGY. Conservative Forces Non-Conservative Forces Conservation of Mechanical Energy Power
ENERGY Conservative Forces Non-Conservative Forces Conservation of Mechanical Energy Power Conservative Forces A force is conservative if the work it does on an object moving between two points is independent
Force Test Review. 1. Give two ways to increase acceleration. You can increase acceleration by decreasing mass or increasing force.
Force Test Review 1. Give two ways to increase acceleration. You can increase acceleration by decreasing mass or increasing force. 2. Define weight. The force of gravity on an object at the surface of
Important: This test consists of 15 multiple choice problems, each worth points.
Physics 214 Practice Exam 1 C Fill in on the OPSCAN sheet: 1) Name 2) Student identification number 3) Exam number as 01 4) Sign the OPSCAN sheet Important: This test consists of 15 multiple choice problems,
5. Use the graph below to determine the displacement of the object at the end of the first seven seconds.
Name: Hour: 1. The slope of the tangent on a position-time graph equals the: Sem 1 Exam Review Advanced Physics 2015-2016 2. The area under the curve on a velocity-time graph equals the: 3. The graph below
Physics 23 Exam 2 March 3, 2009
Use the following to answer question 1: A stationary 4-kg shell explodes into three pieces. Two of the fragments have a mass of 1 kg each and move along the paths shown with a speed of 10 m/s. The third
Everybody remains in a state of rest or continues to move in a uniform motion, in a straight line, unless acting on by an external force.
NEWTON S LAWS OF MOTION Newton s First Law Everybody remains in a state of rest or continues to move in a uniform motion, in a straight line, unless acting on by an external force. Inertia (Newton s 1
Chapter 6. Applications of Newton s Laws
Chapter 6 Applications of Newton s Laws P. Lam 7_11_2018 Learning Goals for Chapter 5 Learn how to apply Newton s First Law & Second Law. Understand the cause of apparent weight and weightlessness Learn
Preparing for Six Flags Physics Concepts
Preparing for Six Flags Physics Concepts uniform means constant, unchanging At a uniform speed, the distance traveled is given by Distance = speed x time At uniform velocity, the displacement is given
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.
2 nd Term Final. Revision Sheet. Students Name: Grade: 9 A/B. Subject: Physics. Teacher Signature
2 nd Term Final Revision Sheet Students Name: Grade: 9 A/B Subject: Physics Teacher Signature 1 PHYSICS WORKSHEET GRADE: 9 MULTIPLE CHOICES In the space provided, write the letter of the term or phrase
SPH 4C Unit 2 Mechanical Systems
SPH 4C Unit 2 Mechanical Systems Forces and Free Body Diagrams Learning Goal: I can consistently identify and draw Free Body Diagrams for given real world situations. There are 4 fundamental forces Gravity
NCERT solution for Work and energy
1 NCERT solution for Work and energy Question 1 A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (See below figure). Let us take it that the force acts on the
Chapter 7 Energy of a System
Chapter 7 Energy of a System Course Outline : Work Done by a Constant Force Work Done by avarying Force Kinetic Energy and thework-kinetic EnergyTheorem Power Potential Energy of a System (Will be discussed
Mechanics and Heat. Chapter 5: Work and Energy. Dr. Rashid Hamdan
Mechanics and Heat Chapter 5: Work and Energy Dr. Rashid Hamdan 5.1 Work Done by a Constant Force Work Done by a Constant Force A force is said to do work if, when acting on a body, there is a displacement
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.
variable Formula S or v SI variable Formula S or v SI 4. How is a Newton defined? What does a Newton equal in pounds?
Newton s Laws 1 1. Define mass variable Formula S or v SI 2. Define inertia, how is inertia related to mass 3. What is a Force? variable Formula S or v SI 4. How is a Newton defined? What does a Newton
MOTION & FORCES. Observing Motion. Speed and Velocity. Distance vs. Displacement CHAPTERS 11 & 12
Observing Motion CHAPTERS 11 & 12 MOTION & FORCES Everything surrounding us is in motion, but it is relative to other object that remain in place. Motion is observed using a frame of reference. Motion
KEY NNHS Introductory Physics: MCAS Review Packet #2
2. Conservation of Energy and Momentum Broad Concept: The laws of conservation of energy and momentum provide alternate approaches to predict and describe the movement of objects. 1.) Which of the following
Machines: Can You lift a car?
Work=Force x Distance 10 m Units of work Nt-m=joules How much work? Machines: Can You lift a car? The ratio of the input force to the output force is called the Mechanical Advantage MA=5000/50=100 1 =
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
Chapter 7 Work and Kinetic Energy. Copyright 2010 Pearson Education, Inc.
Chapter 7 Work and Kinetic Energy Units of Chapter 7 Work Done by a Constant Force Kinetic Energy and the Work-Energy Theorem Work Done by a Variable Force Power 7-1 Work Done by a Constant Force The definition
CONTENTS (BOOK PAGES )
CONTENTS (BOOK PAGES 164-227) Contents...1 nt6 Work and Energy...3 nt6a-wwt1: Object Changing Velocity Work...3 nt6a-cct2: Bicyclist on a Straight Road Work...4 nt6a-wwt3: Boat Position vs. Time Graphs
Exam #2, Chapters 5-7 PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam #2, Chapters 5-7 Name PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The quantity 1/2 mv2 is A) the potential energy of the object.
PHYSICS MIDTERM REVIEW PACKET
PHYSICS MIDTERM REVIEW PACKET PERIOD: TIME: DATE: ROOM: YOU NEED TO BRING: 1. #2 PENCIL W/ ERASER. 2. CALCULATOR (YOUR OWN). YOU WILL NOT BE ALLOWED TO SHARE OR BORROW!!! YOU WILL BE GIVEN: 1. FORMULA
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
Announcements. Principle of Work and Energy - Sections Engr222 Spring 2004 Chapter Test Wednesday
Announcements Test Wednesday Closed book 3 page sheet sheet (on web) Calculator Chap 12.6-10, 13.1-6 Principle of Work and Energy - Sections 14.1-3 Today s Objectives: Students will be able to: a) Calculate
Physics 2010 Work and Energy Recitation Activity 5 (Week 9)
Physics 2010 Work and Energy Recitation Activity 5 (Week 9) Name Section Tues Wed Thu 8am 10am 12pm 2pm 1. The figure at right shows a hand pushing a block as it moves through a displacement Δ! s. a) Suppose
Steps to Solving Newtons Laws Problems.
Mathematical Analysis With Newtons Laws similar to projectiles (x y) isolation Steps to Solving Newtons Laws Problems. 1) FBD 2) Axis 3) Components 4) Fnet (x) (y) 5) Subs 1 Visual Samples F 4 1) F 3 F
Solving two-body problems with Newton s Second Law. Example Static and Kinetic Friction. Section 5.1 Friction 10/15/13
Solving two-body problems with Newton s Second Law You ll get multiple equations from the x and y directions, these equations can be solved simultaneously to find unknowns 1. Draw a separate free body