The Coefficient of Friction

Size: px
Start display at page:

Download "The Coefficient of Friction"

Transcription

1 The Coefficient of Friction OBJECTIVE To determine the coefficient of static friction between two pieces of wood. To determine the coefficient of kinetic friction between two pieces of wood. To investigate the effect of the normal force and the angle of the incline on the coefficient of friction. INTRODUCTION A frictional force is the force exerted by a surface as an object moves across it or makes an effort to move across it. The two most common frictional forces that you will come across in nature are kinetic and static. Though it may not always be the case, the frictional force often opposes the motion of an object. For example, if a block of wood slides across the surface of a desk, then the desk exerts a frictional force in the opposite direction of its motion. Friction results from the two surfaces being pressed together closely, causing intermolecular electrostatic attractive forces between the molecules of the two different surfaces. As such, friction depends upon the nature of the two surfaces (coefficient of friction) and upon the degree to which they are pressed together (the normal force). APPARATUS Inclined plane (wooden board) Computer LabPro Balance Block of wood with eye screw Vernier force sensor Logger Pro Masses THEORY The frictional force between two surfaces sliding relative to one another can be calculated using the formula below F f = µf N (1) On a horizontal surface, the normal force is equivalent to the force due to gravity, or the weight of the object as shown below. In the diagram, an applied force causes the block to move across a horizontal surface at a constant velocity. Therefore, the acceleration is 0 m/s 2 and the net force acting on the block will be zero. The Atwood Machine - Page 1

2 As a result, the applied force through the tension in the string will equal the frictional force as shown below. FN Ff FA Fg F net = F A F f 0 ma = F A F f F f = µ F N = F A (2) On an inclined surface, we again assume that we are able to pull the block up the incline with a constant velocity. Since the acceleration of the system is zero, as before, there is no unbalanced force acting on the block. In this situation, the applied force (FA) on the block must provide enough force to equal the sum of the friction and parallel component of the weight (Fg(Parallel)). FN FA Ff Fg(Parallel) Fg (Perpendicular) Fg The Atwood Machine - Page 2

3 Dual-Range Force Sensor Remembering that Ff = μ * FN (3) We can then develop a relationship for the forces acting along the plane as follows: Fnet = FA - Fg(parallel) - Ff Since the block is moving at a constant speed, Fnet = 0 and the formula can be solved for FA as follows: FA = Fg(parallel) + Ff (4) Since FN = Fg(Perpendicular)), we can use a little trig and substitute (3) into (4) to arrive at: FA = Fg * sin + μ * Fg * cos (5) where μ is the coefficient of friction. EXPERIMENTAL PROCEDURE Part A: Determining the kinetic and static coefficients of friction on a horizontal surface. Wooden block Mass Pull 1. Place the wooden plane flat on the lab table and note its starting position. You will use the same starting position for each trial. 2. Determine the mass of the wooden block to the nearest gram. 3. Add 500g (0.5 kg) to the block. 4. Complete all connections to the LabPro interface and the computer. Connect the force sensor to a DIG/SONIC port on the LabPro. Set the force sensor to the 10N scale. 5. Start Logger Pro. The screen should show a graph with force on the y-axis and time on the x-axis. The time should be scaled from 0-10 seconds. This will be the allotted time to collect your data for each trial. 6. Connect the loop on the block to the hook on the force sensor, and hold it in your hand such that the sensor is parallel to the wooden surface. The Atwood Machine - Page 3

4 7. Press the collect button. on the screen and gradually increase the tensional force acting on the block until it begins to move. Continue to pull on the block such that it moves at a relatively constant speed until the data collection times out. The block should be moving at an extremely slow pace. 8. Determine the average kinetic frictional force by highlighting the region on the graph where the block was in motion (click and drag). This should be pretty clear to you. Then click on the Statistics button,. Record the value in your data table. Note: You may want to rescale your y-axis from 0-10N. 9. To determine the maximum static frictional force, click the Examine button,, and move the mouse across any graph to find the force required to get the block to begin to move. Record this value in your data table. 10. Repeat steps 9 and 10 two more times for the same mass. 11. Add mass to your wooden block in 250g increments for different values of Fg and repeat steps a. Make sure you return the block back to its starting position. 12. Print out the force vs. time graph for the last trial in Procedure A. Label the portion of the graph corresponding to the block at rest, the time when the block just started to move, and the time when the block was moving at constant speed. Part B: Determining the kinetic and static coefficients of friction on an inclined surface 1. Remove all the mass added to the block during procedure A before proceeding to the next step. 2. Incline the plane at some angle between 5 and 20 degrees and record this value in the table below. Repeat steps 8-12 from Procedure A. The Atwood Machine - Page 4

5 COVER PAGE REPORT ITEMS (To be submitted and stapled in the order indicated below) (-5 points if this is not done properly) Lab Title Each lab group member s first and last name printed clearly Color Group Date DATA (worth up to 10 points) Data tables available as a downloadable Excel file ONE sample Force vs. Time graph from the experimental trials with labels DATA ANALYSIS (worth up to 20 points) Required sample calculations, to be shown on a separate sheet of paper in your laboratory report, are highlighted in yellow on the downloadable Excel data table spreadsheet. GRAPHS (worth up to 10 points) Part A: Friction on a Horizontal Surface: 1. Plot the value of k versus the block weight. Scale the y-axis from On the same graph, plot the value of s versus the block weight. ** Print a copy of this graph for your report ** Part B: Friction on an Inclined Surface: Since the plane is inclined at an angle, the frictional force no longer equals the tensional force. Hint: Solve equation (4) for Ff. 1. Plot this kinetic frictional force versus the normal force. 2. Plot this static frictional force versus the normal force. 3. Find the slope of each of these lines. ** Print a copy of this graph for your report ** The Atwood Machine - Page 5

6 GRAPH ANALYSIS (worth up to 20 points) 1. Describe the relationship between and total block weight in Part A, i.e. is there a trend, and what does it tell you? Hint: Look at your graph. 2. Compare the average value of µk when the block moved along the horizontal surface to the average value obtained when the incline was set between 5 and 20 degrees. Explain what these two pieces of data tell you about the influence of the angle on the coefficient of friction. 3. Describe the relationship between the frictional force and the normal force in Part B. What is the significance of the slope of this line? CONCLUSION (worth up to 20 points) See the Physics Laboratory Report Expectations document for detailed information related to each of the four questions indicated below. 1. What was the lab designed to show? 2. What were your results? 3. How do the results support (or not support) what the lab was supposed to show? 4. What are some reasons that the results were not perfect? QUESTIONS (worth up to 10 points) DO NOT forget to include the answers to any questions that were asked within the experimental procedure 1. Using the force vs. time graph you printer in step 12 of Part A, compare the force necessary to keep the block sliding compared to the force necessary to start the slide. How does your answer compare to your expected outcome? 2. Why was it important to have the block move at a constant speed? The Atwood Machine - Page 6

Static and Kinetic Friction

Static and Kinetic Friction Experiment Static and Kinetic Friction Prelab Questions 1. Examine the Force vs. time graph and the Position vs. time graph below. The horizontal time scales are the same. In Region I, explain how an object

More information

Static and Kinetic Friction

Static and Kinetic Friction Static and Kinetic Friction If you try to slide a heavy box resting on the floor, you may find it difficult to get the box moving. Static friction is the force that is counters your force on the box. If

More information

Work and Energy. computer masses (200 g and 500 g) If the force is constant and parallel to the object s path, work can be calculated using

Work and Energy. computer masses (200 g and 500 g) If the force is constant and parallel to the object s path, work can be calculated using Work and Energy OBJECTIVES Use a Motion Detector and a Force Sensor to measure the position and force on a hanging mass, a spring, and a dynamics cart. Determine the work done on an object using a force

More information

Static and Kinetic Friction

Static and Kinetic Friction Dual-Range Force Sensor Computer 12 If you try to slide a heavy box resting on the floor, you may find it difficult to get the box moving. Static friction is the force that counters your force on the box.

More information

Prelab for Friction Lab

Prelab for Friction Lab Prelab for Friction Lab 1. Predict what the graph of force vs. time will look like for Part 1 of the lab. Ignore the numbers and just sketch a qualitative graph 12-1 Dual-Range Force Sensor Friction and

More information

Chapter 4. Forces and the Laws of Motion. CH 4 Forces and the Laws of Motion.notebook. April 09, Changes in Motion. A. Force

Chapter 4. Forces and the Laws of Motion. CH 4 Forces and the Laws of Motion.notebook. April 09, Changes in Motion. A. Force CH 4 Forces and the Laws of Motion.notebook Chapter 4 A. Force April 09, 2015 Changes in Motion Forces and the Laws of Motion 1. Defined as the cause of an acceleration, or the change in an object s motion,

More information

Date Course Name Instructor Name Student(s) Name. Atwood s Machine

Date Course Name Instructor Name Student(s) Name. Atwood s Machine Date Course Name Instructor Name Student(s) Name Atwood s Machine A classic experiment in physics is the Atwood s machine: Two masses on either side of a pulley connected by a light string. When released,

More information

Coefficient of Friction Lab

Coefficient of Friction Lab Name Date Period Coefficient of Friction Lab The purpose of this lab is to determine the relationship between a) the force of static friction and the normal force and b) the force of kinetic friction and

More information

Static and Kinetic Friction (Pasco)

Static and Kinetic Friction (Pasco) Static and Kinetic Friction (Pasco) Introduction: If you try to slide a heavy box resting on the floor, you may find it difficult to move. Static friction is keeping the box in place. There is a limit

More information

Static and Kinetic Friction

Static and Kinetic Friction Experiment 12 If you try to slide a heavy box resting on the floor, you may find it difficult to get the box moving. Static friction is the force that is acting against the box. If you apply a light horizontal

More information

Motion with Changing Speed

Motion with Changing Speed OBJECTIVES Motion with Changing Speed Collect position, velocity, and acceleration data as a ball travels straight up and down. Analyze the position vs. time, velocity vs. time, and acceleration vs. time

More information

Friction Lab. 1. Study the relationship between the frictional force and the normal force.

Friction Lab. 1. Study the relationship between the frictional force and the normal force. Name: Friction Lab Goals: 1. Study the relationship between the frictional force and the normal force. Static Frictional Force: In the first part of this lab we will use the weight of a hanging mass to

More information

Motion with Constant Acceleration

Motion with Constant Acceleration Motion with Constant Acceleration INTRODUCTION Newton s second law describes the acceleration of an object due to an applied net force. In this experiment you will use the ultrasonic motion detector to

More information

Laboratory Exercise. Newton s Second Law

Laboratory Exercise. Newton s Second Law Laboratory Exercise Newton s Second Law INTRODUCTION Newton s first law was concerned with the property of objects that resists changes in motion, inertia. Balanced forces were the focus of Newton s first

More information

LAB 05B: Friction 2 times PURPOSE BACKGROUND MATERIALS PRELIMINARY QUESTIONS: (TO DO BEFORE THE LAB!!) Lab 05B: Friction 1/5 Mr.

LAB 05B: Friction 2 times PURPOSE BACKGROUND MATERIALS PRELIMINARY QUESTIONS: (TO DO BEFORE THE LAB!!) Lab 05B: Friction 1/5 Mr. LAB 05B: Friction 2 times PURPOSE To investigate how friction is related to other variable such as the normal force, weight, and surface coefficients. In this experiment we will determine the static and

More information

Applications of Newton's Laws

Applications of Newton's Laws Applications of Newton's Laws Purpose: To apply Newton's Laws by applying forces to objects and observing their motion; directly measuring these forces that are applied. Apparatus: Pasco track, Pasco cart,

More information

Electric Fields and Equipotentials

Electric Fields and Equipotentials OBJECTIVE Electric Fields and Equipotentials To study and describe the two-dimensional electric field. To map the location of the equipotential surfaces around charged electrodes. To study the relationship

More information

PHY 123 Lab 4 The Atwood Machine

PHY 123 Lab 4 The Atwood Machine PHY 123 Lab 4 The Atwood Machine The purpose of this lab is to study Newton s second law using an Atwood s machine, and to apply the law to determine the acceleration due to gravity experimentally. This

More information

Physics 103 Newton s 2 nd Law On Atwood s Machine with Computer Based Data Collection

Physics 103 Newton s 2 nd Law On Atwood s Machine with Computer Based Data Collection Physics 103 Newton s 2 nd Law On Atwood s Machine with Computer Based Data Collection Materials Photogate with pulley, mass set, ~1.2 meter long string, LabPro analog to digital converter and a computer.

More information

Safety: BE SURE TO KEEP YOUR SMART CART UPSIDE-DOWN WHEN YOU RE NOT ACTIVELY USING IT TO RECORD DATA.

Safety: BE SURE TO KEEP YOUR SMART CART UPSIDE-DOWN WHEN YOU RE NOT ACTIVELY USING IT TO RECORD DATA. Why do people always ignore Objective: 1. Determine how an object s mass affects the friction it experiences. 2. Compare the coefficient of static friction to the coefficient of kinetic friction for each

More information

Partner s Name: EXPERIMENT MOTION PLOTS & FREE FALL ACCELERATION

Partner s Name: EXPERIMENT MOTION PLOTS & FREE FALL ACCELERATION Name: Partner s Name: EXPERIMENT 500-2 MOTION PLOTS & FREE FALL ACCELERATION APPARATUS Track and cart, pole and crossbar, large ball, motion detector, LabPro interface. Software: Logger Pro 3.4 INTRODUCTION

More information

α m ! m or v T v T v T α m mass

α m ! m or v T v T v T α m mass FALLING OBJECTS (WHAT TO TURN IN AND HOW TO DO SO) In the real world, because of air resistance, objects do not fall indefinitely with constant acceleration. One way to see this is by comparing the fall

More information

Static and Kinetic Friction

Static and Kinetic Friction Ryerson University - PCS 120 Introduction Static and Kinetic Friction In this lab we study the effect of friction on objects. We often refer to it as a frictional force yet it doesn t exactly behave as

More information

Work and Energy. Objectives. Equipment. Theory. In this lab you will

Work and Energy. Objectives. Equipment. Theory. In this lab you will Objectives Work and Energy In this lab you will Equipment explore the relationship between the work done by an applied force and the area under the Force-Position graph. confirm that work is equivalent

More information

Understanding 1D Motion

Understanding 1D Motion Understanding 1D Motion OBJECTIVE Analyze the motion of a student walking across the room. Predict, sketch, and test position vs. time kinematics graphs. Predict, sketch, and test velocity vs. time kinematics

More information

Newton s Second Law. Computer with Capstone software, motion detector, PVC pipe, low friction cart, track, meter stick.

Newton s Second Law. Computer with Capstone software, motion detector, PVC pipe, low friction cart, track, meter stick. F = m a F = m a Newton s Second Law 1 Object To investigate, understand and verify the relationship between an object s acceleration and the net force acting on that object as well as further understand

More information

+F N = -F g. F g = m٠a g

+F N = -F g. F g = m٠a g Force Normal = F N Force Normal (or the Normal Force, abbreviated F N ) = F N = The contact force exerted by a surface on an object. The word Normal means perpendicular to Therefore, the Normal Force is

More information

L03 The Coefficient of Static Friction 1. Pre-Lab Exercises

L03 The Coefficient of Static Friction 1. Pre-Lab Exercises L03 The Coefficient of Static Friction 1 Full Name: Lab Section: Pre-Lab Exercises Hand this in at the beginning of the lab period. The grade for these exercises will be included in your lab grade this

More information

E X P E R I M E N T 6

E X P E R I M E N T 6 E X P E R I M E N T 6 Static & Kinetic Friction Produced by the Physics Staff at Collin College Copyright Collin College Physics Department. All Rights Reserved. University Physics, Exp 6: Static and Kinetic

More information

2. How will we adjust our fitting procedure to compensate for fact that the acceleration differs depending on the direction of motion?

2. How will we adjust our fitting procedure to compensate for fact that the acceleration differs depending on the direction of motion? The Coefficient of Kinetic Friction 1 Name: Lab Section Number: Pre-Lab Questions: 1. What type of data will we be using to determine the acceleration of the cart up and down the ramp this week? What type

More information

Experiment 7 : Newton's Third Law

Experiment 7 : Newton's Third Law Experiment 7 : Newton's Third Law To every action there is always opposed an equal reaction, or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts. If you

More information

TIphysics.com. Physics. Friction: Your Friend or Your Enemy? ID: By Irina Lyublinskaya

TIphysics.com. Physics. Friction: Your Friend or Your Enemy? ID: By Irina Lyublinskaya Friction: Your Friend or Your Enemy? ID: 11121 By Irina Lyublinskaya Time required 45 minutes Topic: Force and Motion Construct and interpret a free-body diagram. Measure or calculate the frictional force

More information

Coefficient of Friction

Coefficient of Friction HOUSTON COMMUNITY COLLEGE SYSTEMS SOUTHWEST COLLEGE COLLEGE PHYSICS I PHYS 1401 PRE LAB QUESTIONS Due before lab begins. Coefficient of Friction 1) Explain briefly the different types of frictional forces.

More information

Name: Unit 4 Newton s 1 st & 3 rd Law

Name: Unit 4 Newton s 1 st & 3 rd Law Name: Period: Table #: Unit 4 Newton s 1 st & 3 rd Law 1 UNIT IV: Reading - Force Diagrams The analysis of a problem in dynamics usually involves the selection and analysis of the relevant forces acting

More information

Work and Energy. W F s)

Work and Energy. W F s) Work and Energy Experiment 18 Work is a measure of energy transfer. In the absence of friction, when positive work is done on an object, there will be an increase in its kinetic or potential energy. In

More information

LAB 6 - GRAVITATIONAL AND PASSIVE FORCES

LAB 6 - GRAVITATIONAL AND PASSIVE FORCES 83 Name Date Partners LAB 6 - GRAVITATIONAL AND PASSIVE FORCES OBJECTIVES OVERVIEW And thus Nature will be very conformable to herself and very simple, performing all the great Motions of the heavenly

More information

Lab: Newton s Second Law

Lab: Newton s Second Law Ph4_ConstMass2ndLawLab Page 1 of 9 Lab: Newton s Second Law Constant Mass Equipment Needed Qty Equipment Needed Qty 1 Mass and Hanger Set (ME-8967) 1 Motion Sensor (CI-6742) 1 String (SE-8050) 1 m Balance

More information

Experiment P-9 An Inclined Plane

Experiment P-9 An Inclined Plane 1 Experiment P-9 An Inclined Plane Objectives To understand the principles of forces on an inclined plane. To measure the parallel component of the gravitational force and compare it to the calculated

More information

Physics 1020 Experiment 5. Momentum

Physics 1020 Experiment 5. Momentum 1 2 What is? is a vector quantity which is a product of a mass of the object and its velocity. Therefore p = mv If your system consists of more then one object (for example if it consists of two carts)

More information

Physics 1050 Experiment 3. Force and Acceleration

Physics 1050 Experiment 3. Force and Acceleration Force and Acceleration Prelab uestions! These questions need to be completed before entering the lab. Please show all workings. Prelab 1: Draw the free body diagram for the cart on an inclined plane. Break

More information

MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics Department. Experiment 03: Work and Energy

MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics Department. Experiment 03: Work and Energy MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics Department Physics 8.01 Fall Term 2010 Experiment 03: Work and Energy Purpose of the Experiment: In this experiment you allow a cart to roll down an inclined

More information

Work and Energy. This sum can be determined graphically as the area under the plot of force vs. distance. 1

Work and Energy. This sum can be determined graphically as the area under the plot of force vs. distance. 1 Work and Energy Experiment 18 Work is a measure of energy transfer. In the absence of friction, when positive work is done on an object, there will be an increase in its kinetic or potential energy. In

More information

PHY 221 Lab 7 Work and Energy

PHY 221 Lab 7 Work and Energy PHY 221 Lab 7 Work and Energy Name: Partners: Goals: Before coming to lab, please read this packet and do the prelab on page 13 of this handout. Note: originally, Lab 7 was momentum and collisions. The

More information

Newton's Laws and Atwood's Machine

Newton's Laws and Atwood's Machine Newton's Laws and Atwood's Machine Purpose: In this lab we will verify Newton's Second Law of Motion within estimated uncertainty and propose an explanation if verification is not within estimated uncertainty.

More information

Chabot College Scott Hildreth. Verifying Newton s Second Law: The Atwood Machine

Chabot College Scott Hildreth. Verifying Newton s Second Law: The Atwood Machine Chabot College Scott Hildreth Verifying Newton s Second Law: The Atwood Machine Introduction: A classic experiment in physics to investigate Newton s second law, F = ma, exploring forces and s, is the

More information

Experiment P13: Atwood's Machine (Smart Pulley)

Experiment P13: Atwood's Machine (Smart Pulley) PASCO scientific Physics Lab Manual: P13-1 Experiment P13: Atwood's Machine (Smart Pulley) Concept Time SW Interface Macintosh file Windows file Newton's Laws 45 m 500 or 700 P13 Atwood's Machine P13_ATWD.SWS

More information

Newton s Second Law. Sample

Newton s Second Law. Sample Newton s Second Law Experiment 4 INTRODUCTION In your discussion of Newton s first law, you learned that when the sum of the forces acting on an object is zero, its velocity does not change. However, when

More information

Introduction to Simple Harmonic Motion

Introduction to Simple Harmonic Motion Introduction to Prelab Prelab 1: Write the objective of your experiment. Prelab 2: Write the relevant theory of this experiment. Prelab 3: List your apparatus and sketch your setup.! Have these ready to

More information

CONSERVATION of MOMENTUM

CONSERVATION of MOMENTUM 1 CONSERVATION of MOMENTUM Purpose: Understand conservation of momentum and energy in elastic and inelastic collisions. Examine the concept of impulse in a real-life situation. Apparatus: Pasco track,

More information

Lab 11 Simple Harmonic Motion A study of the kind of motion that results from the force applied to an object by a spring

Lab 11 Simple Harmonic Motion A study of the kind of motion that results from the force applied to an object by a spring Lab 11 Simple Harmonic Motion A study of the kind of motion that results from the force applied to an object by a spring Print Your Name Print Your Partners' Names Instructions April 20, 2016 Before lab,

More information

Second Law. In this experiment you will verify the relationship between acceleration and force predicted by Newton s second law.

Second Law. In this experiment you will verify the relationship between acceleration and force predicted by Newton s second law. Second Law Objective In this experiment you will verify the relationship between acceleration and force predicted by Newton s second law. Apparatus Table clamp, Vertical rod, Right-angle clamp, Horizontal

More information

PHYSICS LAB. Air Resistance. Date: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY

PHYSICS LAB. Air Resistance. Date: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY PHYSICS LAB Air Resistance Printed Names: Signatures: Date: Lab Section: Instructor: GRADE: PHYSICS DEPARMEN JAMES MADISON UNIVERSIY Revision August 2003 air res-68 Air Resistance Air Resistance When you

More information

Incline Plane Activity

Incline Plane Activity Purpose Incline Plane Activity During the activity, students will become familiar with solving static and dynamic incline plane problems. The students will use standard component methods and free body

More information

Physics 11: Friction is Fun! Lab Activity

Physics 11: Friction is Fun! Lab Activity Partner s name: Physics 11: Friction is Fun! Lab Activity SELF ASSESSMENT Hypothesis Graph Discussion Conclusion Key Concept Beginning Developing Accomplished Exemplary o Outline a hypothesis o Identify

More information

EXPERIMENT 6 CONSERVATION OF LINEAR MOMENTUM

EXPERIMENT 6 CONSERVATION OF LINEAR MOMENTUM 210 6-1 I. INTRODUCTION THEORY EXPERIMENT 6 CONSERVATION OF LINEAR MOMENTUM The of two carts on a track can be described in terms of momentum conservation and, in some cases, energy conservation. If there

More information

Straight Line Motion (Motion Sensor)

Straight Line Motion (Motion Sensor) Straight Line Motion (Motion Sensor) Name Section Theory An object which moves along a straight path is said to be executing linear motion. Such motion can be described with the use of the physical quantities:

More information

PHY 123 Lab 10-Simple Harmonic Motion

PHY 123 Lab 10-Simple Harmonic Motion 1 To print higher-resolution math symbols, click the Hi-Res Fonts for Printing button on the jsmath control panel. PHY 123 Lab 10-Simple Harmonic Motion The purpose of this lab is to study simple harmonic

More information

Lab: Applications of Newton s Second Law of Motion

Lab: Applications of Newton s Second Law of Motion Lab: Applications of Newton s Second Law of Motion Purpose: To investigate the relationship between force and acceleration mathematically, then using an Atwood machine verifying our calculations. Equipment:

More information

LAB 3: WORK AND ENERGY

LAB 3: WORK AND ENERGY 1 Name Date Lab Day/Time Partner(s) Lab TA (CORRECTED /4/05) OBJECTIVES LAB 3: WORK AND ENERGY To understand the concept of work in physics as an extension of the intuitive understanding of effort. To

More information

Forces and Newton s Second Law

Forces and Newton s Second Law Forces and Newton s Second Law Goals and Introduction Newton s laws of motion describe several possible effects of forces acting upon objects. In particular, Newton s second law of motion says that when

More information

Name Class Date. Activity P21: Kinetic Friction (Photogate/Pulley System)

Name Class Date. Activity P21: Kinetic Friction (Photogate/Pulley System) Name Class Date Activity P21: Kinetic Friction (Photogate/Pulley System) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Newton s Laws P21 Kinetic Friction.DS P25 Kinetic Friction P25_KINE.SWS

More information

Newton's 2 nd Law. . Your end results should only be interms of m

Newton's 2 nd Law. . Your end results should only be interms of m Newton's nd Law Introduction: In today's lab you will demonstrate the validity of Newton's Laws in predicting the motion of a simple mechanical system. The system that you will investigate consists of

More information

PHY 123 Lab 9 Simple Harmonic Motion

PHY 123 Lab 9 Simple Harmonic Motion PHY 123 Lab 9 Simple Harmonic Motion (updated 11/17/16) The purpose of this lab is to study simple harmonic motion of a system consisting of a mass attached to a spring. You will establish the relationship

More information

Dynamics Review Outline

Dynamics Review Outline Dynamics Review Outline 2.1.1-C Newton s Laws of Motion 2.1 Contact Forces First Law (Inertia) objects tend to remain in their current state of motion (at rest of moving at a constant velocity) until acted

More information

Physics 12 Unit 2: Vector Dynamics

Physics 12 Unit 2: Vector Dynamics 1 Physics 12 Unit 2: Vector Dynamics In this unit you will extend your study of forces. In particular, we will examine force as a vector quantity; this will involve solving problems where forces must be

More information

Force and Motion 20 N. Force: Net Force on 2 kg mass = N. Net Force on 3 kg mass = = N. Motion: Mass Accel. of 2 kg mass = = kg m/s 2.

Force and Motion 20 N. Force: Net Force on 2 kg mass = N. Net Force on 3 kg mass = = N. Motion: Mass Accel. of 2 kg mass = = kg m/s 2. Force and Motion Team In previous labs, you used a motion sensor to measure the position, velocity, and acceleration of moving objects. You were not concerned about the mechanism that caused the object

More information

Lab 8 Impulse and Momentum

Lab 8 Impulse and Momentum b Lab 8 Impulse and Momentum What You Need To Know: The Physics There are many concepts in physics that are defined purely by an equation and not by a description. In some cases, this is a source of much

More information

PHY 221 Lab 9 Work and Energy

PHY 221 Lab 9 Work and Energy PHY 221 Lab 9 Work and Energy Name: Partners: Before coming to lab, please read this packet and do the prelab on page 13 of this handout. Goals: While F = ma may be one of the most important equations

More information

Q2. A book whose mass is 2 kg rests on a table. Find the magnitude of the force exerted by the table on the book.

Q2. A book whose mass is 2 kg rests on a table. Find the magnitude of the force exerted by the table on the book. AP Physics 1- Dynamics Practice Problems FACT: Inertia is the tendency of an object to resist a change in state of motion. A change in state of motion means a change in an object s velocity, therefore

More information

CHAPTER 4 TEST REVIEW -- Answer Key

CHAPTER 4 TEST REVIEW -- Answer Key AP PHYSICS Name: Period: Date: DEVIL PHYSICS BADDEST CLASS ON CAMPUS 50 Multiple Choice 45 Single Response 5 Multi-Response Free Response 3 Short Free Response 2 Long Free Response AP EXAM CHAPTER TEST

More information

Purpose of the experiment

Purpose of the experiment Impulse and Momentum PES 116 Adanced Physics Lab I Purpose of the experiment Measure a cart s momentum change and compare to the impulse it receies. Compare aerage and peak forces in impulses. To put the

More information

Newton s Third Law. mass B = mass A

Newton s Third Law. mass B = mass A Newton s Third Law A common (but confusing) statement of Newton s Third Law is "For every action there is an equal and opposite reaction." In this activity you will measure forces with force sensors and

More information

AP Physics 1 First Semester Final Exam Review

AP Physics 1 First Semester Final Exam Review AP Physics First Semester Final Exam Review Chapters and. Know the SI Units base units.. Be able to use the factor-label method to convert from one unit to another (ex: cm/s to m/year) 3. Be able to identify

More information

Physics 11: Friction is Fun! Lab Activity SELF ASSESSMENT Beginning Developing Accomplished Exemplary

Physics 11: Friction is Fun! Lab Activity SELF ASSESSMENT Beginning Developing Accomplished Exemplary Partner s name: Physics 11: Friction is Fun! Lab Activity SELF ASSESSMENT Beginning Developing Accomplished Exemplary Hypothesis o Outline a hypothesis o Identify some variables o Formulate a testable

More information

Lab 4: Gauss Gun Conservation of Energy

Lab 4: Gauss Gun Conservation of Energy Lab 4: Gauss Gun Conservation of Energy Before coming to Lab Read the lab handout Complete the pre-lab assignment and hand in at the beginning of your lab section. The pre-lab is written into this weeks

More information

Simple Harmonic Motion

Simple Harmonic Motion Introduction Simple Harmonic Motion The simple harmonic oscillator (a mass oscillating on a spring) is the most important system in physics. There are several reasons behind this remarkable claim: Any

More information

Activity P10: Atwood's Machine (Photogate/Pulley System)

Activity P10: Atwood's Machine (Photogate/Pulley System) Name Class Date Activity P10: Atwood's Machine (Photogate/Pulley System) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Newton's Laws P10 Atwood s.ds P13 Atwood's Machine P13_ATWD.SWS Equipment

More information

Motion on a linear air track

Motion on a linear air track Motion on a linear air track Introduction During the early part of the 17 th century, Galileo experimentally examined the concept of acceleration. One of his goals was to learn more about freely falling

More information

Chapter 5: Forces in Two Dimensions. Click the mouse or press the spacebar to continue.

Chapter 5: Forces in Two Dimensions. Click the mouse or press the spacebar to continue. Chapter 5: Forces in Two Dimensions Click the mouse or press the spacebar to continue. Chapter 5 Forces in Two Dimensions In this chapter you will: Represent vector quantities both graphically and algebraically.

More information

Physics 326 Lab 6 10/18/04 DAMPED SIMPLE HARMONIC MOTION

Physics 326 Lab 6 10/18/04 DAMPED SIMPLE HARMONIC MOTION DAMPED SIMPLE HARMONIC MOTION PURPOSE To understand the relationships between force, acceleration, velocity, position, and period of a mass undergoing simple harmonic motion and to determine the effect

More information

POGIL: Newton s First Law of Motion and Statics. Part 1: Net Force Model: Read the following carefully and study the diagrams that follow.

POGIL: Newton s First Law of Motion and Statics. Part 1: Net Force Model: Read the following carefully and study the diagrams that follow. POGIL: Newton s First Law of Motion and Statics Name Purpose: To become familiar with the forces acting on an object at rest Part 1: Net Force Model: Read the following carefully and study the diagrams

More information

Constant velocity and constant acceleration

Constant velocity and constant acceleration Constant velocity and constant acceleration Physics 110 Laboratory Introduction In this experiment we will investigate two rather simple forms of motion (kinematics): motion with uniform (non-changing)

More information

Lab 1 Uniform Motion - Graphing and Analyzing Motion

Lab 1 Uniform Motion - Graphing and Analyzing Motion Lab 1 Uniform Motion - Graphing and Analyzing Motion Objectives: < To observe the distance-time relation for motion at constant velocity. < To make a straight line fit to the distance-time data. < To interpret

More information

The purpose of this laboratory exercise is to verify Newton s second law.

The purpose of this laboratory exercise is to verify Newton s second law. Newton s Second Law 3-1 Newton s Second Law INTRODUCTION Sir Isaac Newton 1 put forth many important ideas in his famous book The Principia. His three laws of motion are the best known of these. The first

More information

EXPERIMENT 7: ANGULAR KINEMATICS AND TORQUE (V_3)

EXPERIMENT 7: ANGULAR KINEMATICS AND TORQUE (V_3) TA name Lab section Date TA Initials (on completion) Name UW Student ID # Lab Partner(s) EXPERIMENT 7: ANGULAR KINEMATICS AND TORQUE (V_3) 121 Textbook Reference: Knight, Chapter 13.1-3, 6. SYNOPSIS In

More information

Lab 8 Impulse and Momentum

Lab 8 Impulse and Momentum b Lab 8 Impulse and Momentum Physics 211 Lab What You Need To Know: The Physics Today we will deal with two physical concepts: impulse and momentum. For both, it turns out to be harder to say what they

More information

Experiment P09: Acceleration of a Dynamics Cart I (Smart Pulley)

Experiment P09: Acceleration of a Dynamics Cart I (Smart Pulley) PASCO scientific Physics Lab Manual: P09-1 Experiment P09: (Smart Pulley) Concept Time SW Interface Macintosh file Windows file Newton s Laws 30 m 500 or 700 P09 Cart Acceleration 1 P09_CAR1.SWS EQUIPMENT

More information

Cart on a Ramp. Evaluation Copy. Figure 1. Vernier Dynamics Track. Motion Detector Bracket

Cart on a Ramp. Evaluation Copy. Figure 1. Vernier Dynamics Track. Motion Detector Bracket Cart on a Ramp Computer 3 This experiment uses an incline and a low-friction cart. If you give the cart a gentle push up the incline, the cart will roll upward, slow and stop, and then roll back down,

More information

Forces. 3. The graph given shows the weight of three objects on planet X as a function of their mass. A. 0 N. B. between 0 N and 12 N C.

Forces. 3. The graph given shows the weight of three objects on planet X as a function of their mass. A. 0 N. B. between 0 N and 12 N C. Name: Date: 1. When a 12-newton horizontal force is applied to a box on a horizontal tabletop, the box remains at rest. The force of static friction acting on the box is 3. The graph given shows the weight

More information

PHYSICS 220 LAB #5: WORK AND ENERGY

PHYSICS 220 LAB #5: WORK AND ENERGY Lab Section / 33 pts Name: Partners: PHYSICS 0 LAB #5: WORK AND ENERGY OBJECTIVES 1. To get practice calculating work.. To understand the concept of kinetic energy and its relationship to the net work

More information

Chapter 4. Forces and Newton s Laws of Motion. continued

Chapter 4. Forces and Newton s Laws of Motion. continued Chapter 4 Forces and Newton s Laws of Motion continued 4.9 Static and Kinetic Frictional Forces When an object is in contact with a surface forces can act on the objects. The component of this force acting

More information

Lab 8. Work and Energy

Lab 8. Work and Energy Lab 8. Work and Energy Goals To apply the concept of work to each of the forces acting on an object pulled up an incline at constant speed. To compare the total work on an object to the change in its kinetic

More information

PHYSICS 211 LAB #3: Frictional Forces

PHYSICS 211 LAB #3: Frictional Forces PHYSICS 211 LAB #3: Frictional Forces A Lab Consisting of 4 Activities Name: Section: TA: Date: Lab Partners: Circle the name of the person to whose report your group printouts will be attached. Individual

More information

Chapter 5. Forces in Two Dimensions

Chapter 5. Forces in Two Dimensions Chapter 5 Forces in Two Dimensions Chapter 5 Forces in Two Dimensions In this chapter you will: Represent vector quantities both graphically and algebraically. Use Newton s laws to analyze motion when

More information

Physics 1050 Experiment 6. Moment of Inertia

Physics 1050 Experiment 6. Moment of Inertia Physics 1050 Moment of Inertia Prelab uestions These questions need to be completed before entering the lab. Please show all workings. Prelab 1 Sketch a graph of torque vs angular acceleration. Normal

More information

Newton s Second Law. Newton s Second Law of Motion describes the results of a net (non-zero) force F acting on a body of mass m.

Newton s Second Law. Newton s Second Law of Motion describes the results of a net (non-zero) force F acting on a body of mass m. Newton s Second Law Newton s Second Law of Motion describes the results of a net (non-zero) force F acting on a body of mass m. F net = ma (1) It should come as no surprise that this force produces an

More information

Air Resistance. Experiment OBJECTIVES MATERIALS

Air Resistance. Experiment OBJECTIVES MATERIALS Air Resistance Experiment 13 When you solve physics problems involving free fall, often you are told to ignore air resistance and to assume the acceleration is constant and unending. In the real world,

More information

Force and Motion. Thought Experiment

Force and Motion. Thought Experiment Team Force and Motion In previous labs, you used a motion sensor to measure the position, velocity, and acceleration of moving objects. You were not concerned about the mechanism that caused the object

More information

ENERGYand WORK (PART I and II) 9-MAC

ENERGYand WORK (PART I and II) 9-MAC ENERGYand WORK (PART I and II) 9-MAC Purpose: To understand work, potential energy, & kinetic energy. To understand conservation of energy and how energy is converted from one form to the other. Apparatus:

More information

ARIZONA STATE UNIVERSITY KIN 335 BIOMECHANICS. LAB #6: Friction

ARIZONA STATE UNIVERSITY KIN 335 BIOMECHANICS. LAB #6: Friction Reading Assignment: McGinnis (2005), pp. 23-26. ARIZONA STATE UNIVERSITY KIN 335 BIOMECHANICS LAB #6: Friction Introduction: When one body moves or tends to move across the surface of another, a friction

More information