Chapter 5 Work and Energy


 Lilian Barnett
 1 years ago
 Views:
Transcription
1 Chapter 5 Work and Energy
2 5.1 Work Done by a Constant Force Definition of work: The work done by a constant force acting on an object is equal to the product of the magnitudes of the displacement and the component of the force parallel to that displacement.
3 5.1 Work Done by a Constant Force In (a), there is a force but no displacement: no work is done. In (b), the force is parallel to the displacement.
4 5.1 Work Done by a Constant Force W = F cos(θ) d Unit of work: newton meter (N m) 1 N m is called 1 joule.
5 5.1 Work Done by a Constant Force What if the force that is applied is in the opposite direction of the displacement? What is the best example of such a force?
6 5.1 Work Done by a Constant Force Friction is a force which always opposes the direction of motion, therefore its work done will always be negative. In the case of lifting an object, gravity works against the motion and therefore does negative work.
7 5.2 Work Done by a Variable Force The force exerted by a spring varies linearly with the displacement:
8 5.2 Work Done by a Variable Force A plot of force versus displacement allows us to calculate the work done:
9 Work Done by a Variable Force F s = kx (ideal spring force) W = ½kx 2 (work done stretching or compressing a spring)
10 What is ENERGY?!
11 5.3 The Work Energy Theorem: Kinetic Energy Kinetic energy is defined: The net work on an object changes its kinetic energy.
12 5.3 The Work Energy Theorem: Kinetic Energy This relationship is called the work energy theorem.
13 Kinetic Energy
14 5.4 Potential Energy Gravitational potential energy: U = m x g x y
15 5.4 Potential Energy Only changes in potential energy are physically significant; therefore, the point where U = 0 may be chosen for convenience.
16 5.4 Potential Energy Potential energy may be thought of as stored work, such as in a compressed spring or an object at some height above the ground. Work done also changes the potential energy (U) of an object.
17 5.4 Potential Energy We can, therefore, define the potential energy of a spring; note that, as the displacement is squared, this expression is applicable for both compressed and stretched springs.
18 Where does the Energy Go? In a perfect system: When you lose potential energy, you gain kinetic energy Example: Object falls what happens? It speeds up! (increased v increased KE) It loses height (decreased y decreased U) When you gain potential energy it is because you are losing kinetic energy Example: Throw an object upwards what happens? It slows down! (decreased v decreased KE) It gains height! (increased y increased U)
19 Conservation (briefly) This balance between kinetic and potential energy is considered conservative because the total energy does not ever change. E Total = KE + U ΔKE + ΔU = 0 When U goes down, KE goes up When KE goes down, U goes up So by extension: ΔU = ΔKE True story.
20 Conservation (briefly) And in a notperfect system? Heat Friction Air Resistance Sound Light But we can just forget that stuff right???
21 Energy Equation Recap Work/Energy W = ΔE W = ΔKE W = ΔU Kinetic Energy (KE) KE = ½ mv 2 Potential Energy (U) Gravitational U = mgy ΔU = mgδy Spring U = ½ kx 2 Total Energy (E) E = KE + U ΔKE + ΔU = 0
22 5.5 Conservation of Energy We observe that, once all forms of energy are accounted for, the total energy of an isolated system does not change. This is the law of conservation of energy: The total energy of an isolated system is always conserved. We define a conservative force: A force is said to be conservative if the work done by it in moving an object is independent of the object s path.
23 5.5 Conservation of Energy So, what types of forces are conservative? Gravity is one; the work done by gravity depends only on the difference between the initial and final height, and not on the path between them. Similarly, a nonconservative force: A force is said to be nonconservative if the work done by it in moving an object does depend on the object s path. The quintessential nonconservative force is friction.
24 5.5 Conservation of Energy Another way of describing a conservative force: A force is conservative if the work done by it in moving an object through a round trip is zero. We define the total mechanical energy:
25 5.5 Conservation of Energy For a conservative force: Many kinematics problems are much easier to solve using energy conservation.
26 5.5 Conservation of Energy All three of these balls have the same initial kinetic energy; as the change in potential energy is also the same for all three, their speeds just before they hit the bottom are the same as well.
27 5.5 Conservation of Energy In a conservative system, the total mechanical energy does not change, but the split between kinetic and potential energy does.
28 5.5 Conservation of Energy If a nonconservative force or forces are present, the work done by the net nonconservative force is equal to the change in the total mechanical energy.
29 What is Power?
30 5.6 Power The average power is the total amount of work done divided by the time taken to do the work. If the force is constant and parallel to the displacement,
31 What is the unit for power?
32 5.6 Power The unit for power, J/s, is more commonly referred to as a Watt (W), named for James Watt whose studies in work, energy, and power helped pave the way for modern machine engines. The British unit, horsepower (hp) is a larger unit still commonly used today: 1 hp = 550 ft lb/s = 746 W
33
34 Practice! 1. Fred pushes boulders for a living. If he applied 450 N of force, moving the boulder 4.0 meters in three minutes How much work has he accomplished? What is Fred s power output 2. Bob the horse outputs 3.73x10 3 J of energy over a 5.00 s period. What is his power output in Watts, what is it in HP?
35 5.6 Power Mechanical efficiency: The efficiency of any real system is always less than 100%.
36 5.6 Power
37 5.6 Equation Recap 1 hp = 746 W
38 Practice! A roller coaster lift system is able to lift a 1600 kg rollercoaster up a height of 34.0 m height in 18.0 seconds What is the power output of this motor? If it took 1.78x10 6 J of energy to accomplish this task, what is the efficiency of the lift system?
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
More information8. 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
More informationGravitational 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
More informationGeneral Physical Science
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
More informationAt 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
More informationPS6.2 Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
PS6.1 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,
More informationWork 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
More informationPHYSICS STUDY GUIDE CHAPTER 10: WORKENERGY. WORK: Potential to do something ( A transfer of energy into or out of the system ).
TOPICS: Work Power Kinetic Energy Gravitational Potential Energy Elastic Potential Energy Conservation of Mechanical energy DEFINITIONS PHYSICS STDY GIDE CHAPTER 10: WORKENERGY WORK: Potential to do something
More informationVELOCITY, ACCELERATION, FORCE
VELOCITY, ACCELERATION, FORCE velocity Velocity v is a vector, with units of meters per second ( m s ). Velocity indicates the rate of change of the object s position ( r ); i.e., velocity tells you how
More informationW i f(x i ) x. i=1. f(x i ) x = i=1
Work Force If an object is moving in a straight line with position function s(t), then the force F on the object at time t is the product of the mass of the object times its acceleration. F = m d2 s dt
More informationPotential / 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:
More informationSection 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.
More informationEnergy  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.
More informationName 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
More informationObjective: Work Done by a Variable Force Work Done by a Spring. Homework: Assignment (125) Do PROBS # (64, 65) Ch. 6, + Do AP 1986 # 2 (handout)
Double Date: Objective: Work Done by a Variable Force Work Done by a Spring Homework: Assignment (125) Do PROBS # (64, 65) Ch. 6, + Do AP 1986 # 2 (handout) AP Physics B Mr. Mirro Work Done by a Variable
More informationKinetic Energy (A) stays the same stays the same (B) increases increases (C) stays the same increases (D) increases stays the same.
1. A cart full of water travels horizontally on a frictionless track with initial velocity v. As shown in the diagram, in the back wall of the cart there is a small opening near the bottom of the wall
More informationLesson 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
More informationWork, Power, and Energy: Explaining the causes of motion without Newton. KIN335 Spring 2005
Work, Power, and Energy: Explaining the causes of motion without Newton KIN335 Spring 2005 What you should know Definition of work and its characteristics Definition of energy (including kinetic energy
More information10.1 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
More information( ) where W is work, f(x) is force as a function of distance, and x is distance.
Work by Integration 1. Finding the work required to stretch a spring 2. Finding the work required to wind a wire around a drum 3. Finding the work required to pump liquid from a tank 4. Finding the work
More informationPhysics Midterm Review Packet January 2010
Physics Midterm Review Packet January 2010 This Packet is a Study Guide, not a replacement for studying from your notes, tests, quizzes, and textbook. Midterm Date: Thursday, January 28 th 8:1510:15 Room:
More informationLesson 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.
More informationLecture 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,
More informationL9 Conservation of Energy, Friction and Circular Motion. Kinetic energy. conservation of energy. Potential energy. Up and down the track
L9 Conseration of Energy, Friction and Circular Motion Kinetic energy, potential energy and conseration of energy What is friction and what determines how big it is? Friction is what keeps our cars moing
More informationChapter 4: Newton s Laws: Explaining Motion
Chapter 4: Newton s Laws: Explaining Motion 1. All except one of the following require the application of a net force. Which one is the exception? A. to change an object from a state of rest to a state
More informationIntroduction Assignment
Physics 11 Introduction Assignment This assignment is intended to familiarize you with some of the basic concepts and skills related to Physics 11. This is the first meaningful assignment for Physics 11,
More information5. Forces and MotionI. Force is an interaction that causes the acceleration of a body. A vector quantity.
5. Forces and MotionI 1 Force is an interaction that causes the acceleration of a body. A vector quantity. Newton's First Law: Consider a body on which no net force acts. If the body is at rest, it will
More informationENERGY CONSERVATION The First Law of Thermodynamics and the Work/KineticEnergy Theorem
PH211 A. La Rosa ENERGY CONSERVATION The irst Law of Thermodynamics and the Work/KineticEnergy Theorem ENERGY TRANSER of ENERGY Heattransfer Q Macroscopic external Work W done on a system ENERGY CONSERVATION
More informationChapter 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
More informationRoller Coaster Mania!
Overview Roller Coaster Mania! This series of educational programs was designed to simultaneously entertain and challenge gifted youth in their time outside of the school setting; however, the activities
More informationWork 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,
More information(and Conservation of Energy)
(and Conservation of Energy) Energy What does the word energy mean to you? (Talk amongst yourselves) Just like always, the physicsdefinition is a little bit different, but we re going to hold off on it
More informationAP1 Dynamics. Answer: (D) foot applies 200 newton force to nose; nose applies an equal force to the foot. Basic application of Newton s 3rd Law.
1. A mixed martial artist kicks his opponent in the nose with a force of 200 newtons. Identify the actionreaction force pairs in this interchange. (A) foot applies 200 newton force to nose; nose applies
More informationEnergy 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
More informationProving the Law of Conservation of Energy
Table of Contents List of Tables & Figures: Table 1: Data/6 Figure 1: Example Diagram/4 Figure 2: Setup Diagram/8 1. Abstract/2 2. Introduction & Discussion/3 3. Procedure/5 4. Results/6 5. Summary/6 Proving
More informationEVALUAT ING ACADEMIC READINESS FOR APPRENTICESHIP TRAINING Revised for ACCESS TO APPRENTICESHIP
EVALUAT ING ACADEMIC READINESS FOR APPRENTICESHIP TRAINING for ACCESS TO APPRENTICESHIP SCIENCE SKILLS SIMPLE MACHINES & MECHANICAL ADVANTAGE AN ACADEMIC SKILLS MANUAL for The Construction Trades: Mechanical
More informationC 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
More informationWhat 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
More informationProblem 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
More informationConservative forces and the potential energy function. Nonconservative forces and the workenergy theorem
Nonconservative forces and the workenergy theorem Consider an object falling with airresistance. There are two forces to consider; the gravitational force (conservative) and the drag force (nonconservative).
More informationPhysics 2A, Sec B00: Mechanics  Winter 2011 Instructor: B. Grinstein Final Exam
Physics 2A, Sec B00: Mechanics  Winter 2011 Instructor: B. Grinstein Final Exam INSTRUCTIONS: Use a pencil #2 to fill your scantron. Write your code number and bubble it in under "EXAM NUMBER;" an entry
More informationUsing 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 daytoday activities Competency level 3.1 Investigates
More informationB) 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
More informationPrelab Exercises: Hooke's Law and the Behavior of Springs
59 Prelab Exercises: Hooke's Law and the Behavior of Springs Study the description of the experiment that follows and answer the following questions.. (3 marks) Explain why a mass suspended vertically
More informationEDUH 1017  SPORTS MECHANICS
4277(a) Semester 2, 2011 Page 1 of 9 THE UNIVERSITY OF SYDNEY EDUH 1017  SPORTS MECHANICS NOVEMBER 2011 Time allowed: TWO Hours Total marks: 90 MARKS INSTRUCTIONS All questions are to be answered. Use
More informationIn 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
More informationPotential Energy and Equilibrium in 1D
Potential Energy and Equilibrium in 1D Figures 627, 628 and 629 of TiplerMosca. du = F x dx A particle is in equilibrium if the net force acting on it is zero: F x = du dx = 0. In stable equilibrium
More informationMechanics 1: Conservation of Energy and Momentum
Mechanics : Conservation of Energy and Momentum If a certain quantity associated with a system does not change in time. We say that it is conserved, and the system possesses a conservation law. Conservation
More informationPractice 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
More information1 of 7 9/5/2009 6:12 PM
1 of 7 9/5/2009 6:12 PM Chapter 2 Homework Due: 9:00am on Tuesday, September 8, 2009 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]
More informationEnergy and Its Conservation
CHAPTER 6 Energy and Its Conservation Work: not always what you think Energy of motion: kinetic energy Energy of position: potential energy Gravitational potential energy The reference level Mechanical
More informationSpeed A B C. Time. Chapter 3: Falling Objects and Projectile Motion
Chapter 3: Falling Objects and Projectile Motion 1. Neglecting friction, if a Cadillac and Volkswagen start rolling down a hill together, the heavier Cadillac will get to the bottom A. before the Volkswagen.
More informationMidterm 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
More informationChapter 3.8 & 6 Solutions
Chapter 3.8 & 6 Solutions P3.37. Prepare: We are asked to find period, speed and acceleration. Period and frequency are inverses according to Equation 3.26. To find speed we need to know the distance traveled
More informationEXPERIMENT 3 Analysis of a freely falling body Dependence of speed and position on time Objectives
EXPERIMENT 3 Analysis of a freely falling body Dependence of speed and position on time Objectives to verify how the distance of a freelyfalling body varies with time to investigate whether the velocity
More informationProblem 6.40 and 6.41 Kleppner and Kolenkow Notes by: Rishikesh Vaidya, Physics Group, BITSPilani
Problem 6.40 and 6.4 Kleppner and Kolenkow Notes by: Rishikesh Vaidya, Physics Group, BITSPilani 6.40 A wheel with fine teeth is attached to the end of a spring with constant k and unstretched length
More informationAnswer, Key Homework 7 David McIntyre 45123 Mar 25, 2004 1
Answer, Key Hoework 7 David McIntyre 453 Mar 5, 004 This printout should have 4 questions. Multiplechoice questions ay continue on the next colun or page find all choices before aking your selection.
More informationForces. When an object is pushed or pulled, we say that a force is exerted on it.
Forces When an object is pushed or pulled, we say that a force is exerted on it. Forces can Cause an object to start moving Change the speed of a moving object Cause a moving object to stop moving Change
More informationChapter 07 Test A. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.
Class: Date: Chapter 07 Test A Multiple Choice Identify the choice that best completes the statement or answers the question. 1. An example of a vector quantity is: a. temperature. b. length. c. velocity.
More informationProblem Set V Solutions
Problem Set V Solutions. Consider masses m, m 2, m 3 at x, x 2, x 3. Find X, the C coordinate by finding X 2, the C of mass of and 2, and combining it with m 3. Show this is gives the same result as 3
More informationPage Topic Further Support Materials
This booklet will discuss some of the principles involved in the design of a roller coaster. It is intended for the middle or high school teacher. Physics students may find the information helpful as well.
More informationPhysics B AP Review Packet: Mechanics Name:
Name: Position Location of a particle in space. (x) or (x,y) or (x,y,z) Distance The total length of the path traveled by an object. Does not depend upon direction. Displacement The change in position
More informationChapter 4: Springs generate force and store energy
Chapter 4: A. Compound Springs he physical concepts of motion, force, energy, and momentum, are often confused. he distinctions are particularly clear in the spring model of matter that has been developed
More informationProof of the conservation of momentum and kinetic energy
Experiment 04 Proof of the conservation of momentum and kinetic energy By Christian Redeker 27.10.2007 Contents 1.) Hypothesis...3 2.) Diagram...7 3.) Method...7 3.1) Apparatus...7 3.2) Procedure...7 4.)
More informationVocabulary: Familiarity with these terms and concepts will enhance students experience in the activity
Energize your students with this exploration of the way energy transforms and transfers. Using household items and their knowledge, students will build fun contraptions that will make a ball move and hit
More informationHOOKE S LAW AND OSCILLATIONS
9 HOOKE S LAW AND OSCILLATIONS OBJECTIVE To measure the effect of amplitude, mass, and spring constant on the period of a springmass oscillator. INTRODUCTION The force which restores a spring to its equilibrium
More informationSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Exam Name SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s.
More informationSlide 10.1. Basic system Models
Slide 10.1 Basic system Models Objectives: Devise Models from basic building blocks of mechanical, electrical, fluid and thermal systems Recognize analogies between mechanical, electrical, fluid and thermal
More informationReview Assessment: Lec 02 Quiz
COURSES > PHYSICS GUEST SITE > CONTROL PANEL > 1ST SEM. QUIZZES > REVIEW ASSESSMENT: LEC 02 QUIZ Review Assessment: Lec 02 Quiz Name: Status : Score: Instructions: Lec 02 Quiz Completed 20 out of 100 points
More informationPotential and Kinetic Energy: Energy in the Pole Vault
Chapter Physics in Action SECTION 8 Potential and Kinetic Energy: Energy in the Pole Vault Section Overview Students design experiments to investigate how energy is converted from one form to another.
More informationWhen showing forces on diagrams, it is important to show the directions in which they act as well as their magnitudes.
When showing forces on diagrams, it is important to show the directions in which they act as well as their magnitudes. mass M, the force of attraction exerted by the Earth on an object, acts downwards.
More information8. As a cart travels around a horizontal circular track, the cart must undergo a change in (1) velocity (3) speed (2) inertia (4) weight
1. What is the average speed of an object that travels 6.00 meters north in 2.00 seconds and then travels 3.00 meters east in 1.00 second? 9.00 m/s 3.00 m/s 0.333 m/s 4.24 m/s 2. What is the distance traveled
More informationConservation of Energy Physics Lab VI
Conservation of Energy Physics Lab VI Objective This lab experiment explores the principle of energy conservation. You will analyze the final speed of an air track glider pulled along an air track by a
More informationForms 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
More informationRoanoke Pinball Museum Key Concepts
Roanoke Pinball Museum Key Concepts What are Pinball Machines Made of? SOL 3.3 Many different materials are used to make a pinball machine: 1. Steel: The pinball is made of steel, so it has a lot of mass.
More information(Equation 1) to determine the cord s characteristics. Hooke s Law represents the
Using Hooke s Law to Solve for Length of Bungee Cord Needed for Egg Drop Introduction This experiment is the second part of a three part experiment. The first two lead up to the final in which we aim
More informationRopes and Pulleys Investigations. Level A Investigations. Level B Investigations
Ropes and Pulleys Investigations Level A Investigations Ropes and Pulleys How can you use the ropes and pulleys to lift large weights with small forces? In this Investigation, students learn to define
More informationSerway_ISM_V1 1 Chapter 4
Serway_ISM_V1 1 Chapter 4 ANSWERS TO MULTIPLE CHOICE QUESTIONS 1. Newton s second law gives the net force acting on the crate as This gives the kinetic friction force as, so choice (a) is correct. 2. As
More informationUnit 2 Force and Motion
Force and Motion Unit 2 Force and Motion Learning Goal (TEKS): Identify and describe the changes in position, direction, and speed of an object when acted upon by unbalanced forces. This means: We are
More informationAccelerometers: Theory and Operation
123776C Accelerometers: Theory and Operation The Vertical Accelerometer Accelerometers measure accelerations by measuring forces. The vertical accelerometer in this kit consists of a lead sinker hung
More information4 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?
More informationSupplemental Questions
Supplemental Questions The fastest of all fishes is the sailfish. If a sailfish accelerates at a rate of 14 (km/hr)/sec [fwd] for 4.7 s from its initial velocity of 42 km/h [fwd], what is its final velocity?
More informationConservation of Momentum and Energy
Conservation of Momentum and Energy OBJECTIVES to investigate simple elastic and inelastic collisions in one dimension to study the conservation of momentum and energy phenomena EQUIPMENT horizontal dynamics
More information1. Which of the 12 parent functions we know from chapter 1 are power functions? List their equations and names.
Pre Calculus Worksheet. 1. Which of the 1 parent functions we know from chapter 1 are power functions? List their equations and names.. Analyze each power function using the terminology from lesson 1.
More informationP211 Midterm 2 Spring 2004 Form D
1. An archer pulls his bow string back 0.4 m by exerting a force that increases uniformly from zero to 230 N. The equivalent spring constant of the bow is: A. 115 N/m B. 575 N/m C. 1150 N/m D. 287.5 N/m
More informationThe University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS. Wednesday, June 17, 2015 1:15 to 4:15 p.m.
P.S./PHYSICS The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS Wednesday, June 17, 2015 1:15 to 4:15 p.m., only The possession or use of any communications
More informationBalanced and Unbalanced Forces
1 Balanced and Unbalanced Forces Lesson Created by Carlos Irizarry, George B. Swift Specialty School, Chicago, Illinois Purpose To fully appreciate and make a connection to Newton s Laws, students must
More informationPhysics Lab Report Guidelines
Physics Lab Report Guidelines Summary The following is an outline of the requirements for a physics lab report. A. Experimental Description 1. Provide a statement of the physical theory or principle observed
More informationPhysics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion
Physics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion Conceptual Questions 1) Which of Newton's laws best explains why motorists should buckleup? A) the first law
More informationSteps 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
More informationUniversity Physics 226N/231N Old Dominion University. Getting Loopy and Friction
University Physics 226N/231N Old Dominion University Getting Loopy and Friction Dr. Todd Satogata (ODU/Jefferson Lab) satogata@jlab.org http://www.toddsatogata.net/2012odu Friday, September 28 2012 Happy
More informationExam Three Momentum Concept Questions
Exam Three Momentum Concept Questions Isolated Systems 4. A car accelerates from rest. In doing so the absolute value of the car's momentum changes by a certain amount and that of the Earth changes by:
More informationMechanical Systems. Grade 8 Unit 4 Test. 1. A wheelbarrow is an example of what simple machine? Class 1 lever. Class 2 lever.
Mechanical Systems Grade 8 Unit 4 Test Student Class 1. A wheelbarrow is an example of what simple machine? D Wheel and Axle 2. A hockey stick is an example of what simple machine? D Inclined plane 3.
More informationSIZE. Energy. NonMechanical Energy. Mechanical Energy. Part II. Examples of NonMechanical Energy. Examples of Mechanical Energy.
Energy Part II NonMechanical 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 nonmechanical energy!?!? Mechanical Energy
More informationA) F = k x B) F = k C) F = x k D) F = x + k E) None of these.
CT161 Which of the following is necessary to make an object oscillate? i. a stable equilibrium ii. little or no friction iii. a disturbance A: i only B: ii only C: iii only D: i and iii E: All three Answer:
More information6 WORK and ENERGY. 6.0 Introduction. 6.1 Work and kinetic energy. Objectives
6 WORK and ENERGY Chapter 6 Work and Energy Objectives After studying this chapter you should be able to calculate work done by a force; be able to calculate kinetic energy; be able to calculate power;
More informationChapter 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
More informationForce, motion and machines
Force, motion and machines Introduction This topic explores the key concepts of force, motion and machines as they relate to: forces motion and inertia Newton s laws of motion force and pressure energy
More information6. Block and Tackle* Block and tackle
6. Block and Tackle* A block and tackle is a combination of pulleys and ropes often used for lifting. Pulleys grouped together in a single frame make up what is called a pulley block. The tackle refers
More information