Chapter 4. Work and Simple Machines
|
|
|
- Aleesha Reynolds
- 7 years ago
- Views:
Transcription
1 Chapter 4 Work and Simple Machines
2 4 1 Work and Power
3 What is Work? Work is done when a force exerted on an object causes that object to move a distance. The motion must be in the direction of the force. Measured in Joules. ( J )
4 Is this work? Is there work being done here? Is the object moving in the direction of the force being exerted?
5 Is this work? Is there work being done here? Is the object moving in the direction of the force being exerted?
6
7
8 Calculating Work Joules Newtons Meters Work = Force * Distance W = F d
9 Example 1. As you push a lawn mower, the horizontal force is 300 N. If you push the lawn mower 500 m, how much work did you do? W = F d 300 N 500 m W = 300 N * 500 m? W = 150,000 J
10 3 months 30 years
11 What is Power? Power the rate at which work is done. How fast work is done. Why the term power was developed
12 Calculating Power Watts ( W ) Joules ( J ) Power = Work Time Seconds ( s )
13 Example 1. At the start of a race, a car does 50,000 J of work in 7 seconds. How much power did the car have? Work 50,000 J Power = Time 7 s 50,000 J Power = 7 s? Power = 7,142.9 W
14 Power and Energy When you do work, you lose energy. The energy doesn t just disappear The energy is transferred to the object you are doing work on. For example When you slam a locker shut ( work ), you are transferring energy to the locker. more Power means more Energy
15 4 2 Using Machines
16 What is a Machine? Machine A device that makes work easier.
17 How do machines make work easier? Machine make work easier by changing the force we exert in : 1. Size 2. Direction 3. Both
18 Size
19 Direction
20 Machines help us overcome 2 things : 1. Gravity Lifting objects 2. Friction Moving objects
21 Machine does not decrease the amount of work we do. Usually we have to do more work with a machine
22 Mechanical Advantage Mechanical Advantage the number of times that a machine multiplies the effort force.
23 Calculating Mechanical Advantage Newtons Newtons MA = F out F in
24 Example 1. To open a bottle, you apply a force of 50N on the bottle opener. The bottle opener applies a force of 775N to the bottle cap. What is the mechanical advantage of the bottle opener?
25 Example 1. While riding your bicycle, you apply a force of 350N to the pedals. The wheels of the bicycle apply a force of 250N to the ground. What is the mechanical advantage of the bicycle?
26 Efficiency Some of the input work is transferred into heat energy by friction inside a machine. Efficiency the ratio of output work to the input work. Efficiency = Output Work Input Work x 100 %
27 Example 1. You do 100 J of work in pulling out a nail with a claw hammer. If the hammer does 70 J of work, what is the hammer s efficiency?
28 Example 1. You do 150 J of work pushing a box up a ramp. If the ramp does 105 J of work, what is the efficiency of the ramp? W in = W out = Eff = 150 J 105 J? W out Eff = x 100 % W in Eff = 105 J x 100 % 150 J Eff = 0.7 x 100 % = 70 %
29 4-3 Simple Machines
30 What is a Simple Machine? Simple Machine A machine that does work with only one movement. Compound Machine A machine made up of a combination of simple machines.
31 6 Types of Simple Machines 1. Lever 2. Pulley 3. Wheel and Axle 4. Inclined Plane 5. Screw 6. Wedge
32 Lever Lever A bar that is free to pivot, or turn, about a fixed point. Fulcrum the fixed point of a lever. IMA = l in l out = Length of Input Arm Length of Output Arm
33 Example You can use a crowbar 140 cm long to lift a large rock that is 20 cm from the fulcrum. What is the IMA of the lever?
34
35 3 Classes of Levers 1. First Class Lever the fulcrum is in the middle. 2. Second Class Lever the weight is in the middle. 3. Third Class Lever the input force is in the middle.
36 First Class Lever
37
38
39 Second Class Lever
40 Third Class Lever
41
42 Pulley Pulley A grooved wheel with a rope or a chain running along the groove. The IMA for a Pulley is : The number of ropes holding the resistance weight.
43 Weight
44 Weight
45 Weight
46 3 Classes of Pulleys 1. Fixed Pulley there is a single pulley attached to an immovable object. 2. Movable Pulley there is a single pulley attached to the resistance force. 3. Block and Tackle there are 2 or more pulleys, both fixed and movable working together.
47
48
49
50
51 Wheel and Axle Wheel and Axle a simple machine consisting of two wheels of different sizes that rotate together. Doorknob, faucet handle, icecream makers, bicycle gears. IMA = Radius of wheel r = w Radius of axle r a
52 Example The wheel of an ice-cream maker has a radius of 20 cm. The axle has a radius of 15 cm. What is the IMA of the ice-cream maker?
53
54
55
56
57
58 Inclined Plane Inclined Plane a sloping surface used to raise objects. IMA = Length of slope Height of slope = l h
59
60 Screw Screw An inclined plane wrapped around a cylindrical post.
61 Wedge Wedge an inclined plane with one or two sloping sides. An inclined plane that moves, generally used for cutting.
Directed Reading A. Section: Types of Machines LEVERS
Skills Worksheet Directed Reading A Section: Types of Machines 1. A knife is actually a very sharp. 2. What are the six simple machines that all other machines are made from? LEVERS 3. A simple machine
ANSWER KEY. Work and Machines
Chapter Project Worksheet 1 1. inclined plane, wedge, screw, lever, wheel and axle, pulley 2. pulley 3. lever 4. inclined plane 5. Answers will vary: top, side, or bottom 6. Answers will vary; only one
Name Class Date. Pulley. Wedge
CHAPTER 13 2 Simple Machines SECTION Work and Energy KEY IDEAS As you read this section, keep these questions in mind: What are simple machines? What simple machines are in the lever family? What simple
F output. F input. F = Force in Newtons ( N ) d output. d = distance ( m )
Mechanical Advantage, Speed Ratio, Work and Efficiency Machines Make Work Easier Machines help people do things that they normally couldn t do on their own. Mechanical Advantage A machine makes work easier
The Lever. The law of conservation of energy applies to all machines!
Simple Machines A machine is a device for multiplying forces or simply changing the direction of forces. Many machines can increase the speed with which work is done. The Lever The law of conservation
Mechanical Reasoning Review
Mechanical Reasoning Review Work can be made easier or faster through practical applications of simple and/or compound machines. This is called mechanical advantage - in other words, using the principal
2.) In general, what do most simple machines do? Simple machines make work easier by reducing the force needed.
Name: Simple Machines Study Guide Force and Work- 1.) To be considered work, you have to have a force and a distance through which the force acts. 2.) What is the formula for work? work = force x distance_
The origin of the wedge is unknown, because it has been in use as early as the stone age.
Simple Machines Compiled and edited from Wikipedia Inclined Plane An inclined plane is a plane surface set at an angle, other than a right angle, against a horizontal surface. The inclined plane permits
Compound Machine: Two or more simple machines working together to make work easier. Examples: Wheelbarrow, Can Opener, Bicycle
Name SOL 4.2 Simple and Compound Machines NOTE - Simple machines are NOT included in the 5 th REVISED Science Standards Simple Machine: A machine with few or no moving parts. Simple machines make work
EVALUAT 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
Simple Machines. What are simple machines?
Definitions to know: Simple Machines Work done when an applied force causes an object to move in the direction of the force Energy ability to cause change; can change the speed, direction, shape, or temperature
Overall Indicator: The student: recognizes the effects of forces acting on structures and mechanisms
Grade 5 Performance Task: Disaster Recovery Content Connections Assessment Criterion Understanding of basic concepts Overall Indicator: The student: recognizes the effects of forces acting on structures
What are simple machines? primary
What are simple machines? primary Here you will discover all sorts of interesting things about simple machines and how they work. There are some great diagrams as well! A machine is something that makes
Georgia Performance Standards Framework for Physical Science 8 th GRADE. Unit: Fast and Furious Forces General Task Life is Easy with Simple Machines
Subject Area: Physical Science Grade: 8 Unit: Fast and Furious Forces General Task Life is Easy with Simple Machines S8P3. Students will investigate relationship between force, mass, and the motion of
Mechanical 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.
Unit 8A: Systems in Action (Pg. 2 85) Chapter 2: Getting to Work (pg. 28 55)
Unit 8A: Systems in Action (Pg. 2 85) Chapter 2: Getting to Work (pg. 28 55) Name: Date: 2.1: Physical Systems: Simple Machines (Pg. 30 35): Read Pages 30-35. Answer the following questions on pg. 35:
Name: Partners: Period: Coaster Option: 1. In the space below, make a sketch of your roller coaster.
1. In the space below, make a sketch of your roller coaster. 2. On your sketch, label different areas of acceleration. Put a next to an area of negative acceleration, a + next to an area of positive acceleration,
Pre and Post-Visit Activities
Pre and Post-Visit Activities Simple Machines Table of Contents: Important Information: 2 Vocabulary: 3 Pre-Visit Activities: 4 Post-Visit Activities: 5 Vocabulary Word Search: 6 2 Important Information
Inclined Plane: Distance vs. Force
1a Inclined Plane: Distance vs. Force Look at the inclined plane model you built for Card 2. It s a ramp, so it s easy to slide or roll things up and down it. As you noticed, it is a little more difficult
Fulcrum Effort or Applied Force. Fulcrum Load or Resistance. Effort or Applied Force. Load or Resistance. Other First Class Lever Examples.
First Class Lever Second Class Lever Load or Resistance Fulcrum Effort or Applied Force Fulcrum Load or Resistance Effort or Applied Force Other First Class Lever Examples Action Spring Force Load Applied
Simple Machines Quiz
Simple Machines Quiz Part 1. Write the name of the simple machine that is described questions 1-4 below. Word Bank: Wheel & Axle Screw Pulley Inclined Plane Lever 1. These two parts act as one simple machine.
7 TH GRADE SCIENCE REVIEW
7 TH GRADE SCIENCE REVIEW The motion of an object is always judged with respect to some other object or point. When an object changes position over time relative to a reference point, the object is in
Partnerships Implementing Engineering Education Worcester Polytechnic Institute Worcester Public Schools
Partnerships Implementing Engineering Education Worcester Polytechnic Institute Worcester Public Schools Supported by: National Science Foundation Simple Machines: 4.G.1 Introduction to Simple Machines
Partnerships Implementing Engineering Education Worcester Polytechnic Institute Worcester Public Schools
Partnerships Implementing Engineering Education Worcester Polytechnic Institute Worcester Public Schools Supported by: National Science Foundation Simple Machines: 4.G.2 _ Inclined Planes and Pulleys Grade
Simple Kitchen Machines
Provided by TryEngineering - Lesson Focus Lesson focuses on simple machines and how they can be found in many everyday items. Students explore the different types of simple machines, how they work, and
Christa s Lost Lessons Simple Machines
Christa s Lost Lessons Simple Machines Introduction: Among the six lost lessons, the simple machines demonstration was most rudimentary. Perhaps, it is because most earth-based simple machines are crafted
Levers and Pulleys. 5 th Grade Science Investigation. Unit
Levers and Pulleys 5 th Grade Science Investigation Unit What Do We Already Know? A lever and pulley are mechanical advantages=makes work easier, and helps lift things you couldn t t normally lift Combined
Using mechanical energy for daily
unit 3 Using mechanical energy for daily activities Physics Chapter 3 Using mechanical energy for daily activities Competency Uses mechanical energy for day-to-day activities Competency level 3.1 Investigates
SCIENCE STD. V (2015) More About Force Energy and Simple Machines. Name Roll No. Date Std. V
SCIENCE STD. V (2015) More About Force Energy and Simple Machines Name Roll No. Date Std. V Q1.What is Force? Force is a push or a pull that makes the things move. Q2.What effect does Force has on our
Playful machines A Facilitator s Guide to Simple Machines in the Playground
inspiring discovery Playful machines A Facilitator s Guide to Simple Machines in the Playground Our Vision Canadians recognize that Science 1 is intrinsic to their lives and acknowledge the fundamental
Clipper Creations. Provided by TryEngineering - www.tryengineering.org Click here to provide feedback on this lesson.
Provided by TryEngineering - Click here to provide feedback on this lesson. Lesson Focus Develop a working model of a nail clipper. Note: This lesson plan is designed for classroom use only, with supervision
Simple Machines. Figure 2: Basic design for a mousetrap vehicle
Mousetrap Vehicles Figure 1: This sample mousetrap-powered vehicle has a large drive wheel and a small axle. The vehicle will move slowly and travel a long distance for each turn of the wheel. 1 People
Simple machines provide a mechanical advantage that makes our work faster and easier, and they are all around us every day.
LEARNING MODULE: SIMPLE MACHINES Pre-Visit Activities We suggest that you use these pre-visit classroom acitivites to prepare your students for a rewarding Museum visit. Before your visit, introduce your
Simple machines. Law of Simple Machines. Resistance Force x resistance distance = effort force x effort distance
Simple machines A simple machine is a evice that requires only the force of a human to perform work. One of the properties of a simple machine is that it can be use to increase the force that can be applie
Everyday Simple Machines
Everyday Simple Machines Teacher's Guide Editors: Brian A. Jerome Ph.D. Stephanie Zak Jerome Assistant Editors: Louise Marrier Hannah Fjeld Graphics: Fred Thodal Heidi Berry Lyndsey Canfield www.visuallearningco.com
Questions: Does it always take the same amount of force to lift a load? Where should you press to lift a load with the least amount of force?
Lifting A Load 1 NAME LIFTING A LOAD Questions: Does it always take the same amount of force to lift a load? Where should you press to lift a load with the least amount of force? Background Information:
PUSH AND PULL: SIMPLE MACHINES AT WORK
PUSH AND PULL: SIMPLE MACHINES AT WORK 1 videocassette... 23 minutes Copyright MCMXC Rainbow Educational Media 4540 Preslyn Drive Raleigh, NC 27616-3177 Distributed by: United Learning 1560 Sherman Ave.,
Machines. Simple. What is a machine?
Simple Machines Worksheet 2 A worksheet produced by the Native Access to Engineering Programme Concordia University, Montreal What is a machine? Webster s Dictionary defines a machine as 1. a structure
Name Class Date. You do twice as much work. b. You lift two identical books one meter above the ground.
Exercises 9.1 Work (pages 145 146) 1. Circle the letter next to the correct mathematical equation for work. work = force distance work = distance force c. work = force distance d. work = force distance
Engineer III Simple Machines
Harford District 2014 Cub Scout Day Camp June 23-78 Knights of the Roundtable Engineer III Simple Machines Station Volunteer s Guide Thank you for being a station volunteer! The stations are the heart
You ll have leverage as you guide
Teacher s Guide Simple Machines Dear Educator, You ll have leverage as you guide students in the exploration of simple machines. In KIDS DISCOVER Simple Machines, your young scientists will learn about
Technology Exploration-I
Technology Exploration-I PREPARED BY Academic Services August 2011 Applied Technology High Schools, 2011 Module Objectives After the completion of this module, the student should be able to: Identify pulleys.
MECHANICAL PRINCIPLES OUTCOME 4 MECHANICAL POWER TRANSMISSION TUTORIAL 1 SIMPLE MACHINES
MECHANICAL PRINCIPLES OUTCOME 4 MECHANICAL POWER TRANSMISSION TUTORIAL 1 SIMPLE MACHINES Simple machines: lifting devices e.g. lever systems, inclined plane, screw jack, pulley blocks, Weston differential
When you have completed this lesson you will be able to: identify some common simple machines explain how simple machines make work easier
Simple machines OBJECTIVES When you have completed this lesson you will be able to: identify some common simple machines explain how simple machines make work easier A machine is an invention that makes
Levers for Lifting BROWARD COUNTY ELEMENTARY SCIENCE BENCHMARK PLAN ACTIVITY ASSESSMENT OPPORTUNITIES. Grade 3 Quarter 3 Activity 23
activity Levers for Lifting BROWARD COUNTY ELEMENTARY SCIENCE BENCHMARK PLAN Grade Quarter Activity SC.C... The student understands that the motion of an object can be described and measured. SC.H... The
3rd/4th Grade Science Unit: Forces and Motion. Melissa Gucker TE 804 Spring 2007
3rd/4th Grade Science Unit: Forces and Motion Melissa Gucker TE 804 Spring 2007 Part I: Learning Goals Documentation Unit Title: Forces and Motion Grade Level: 3 rd Designer: Melissa Gucker The Main Idea(s)/Importance
INCLINED PLANE LEVER SCREW WHEEL & AXLE WEDGE PULLEY
HANDBOOK Machines are tools that help people do work more easily. In physics, you do work anytime you use force to move an object. Skateboards, cars, bikes, shovels, boats, doors, light switches, and stairs
Roanoke 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.
Lesson Plans. Teacher: High School Physical Science Grade: 9th. Curricular Areas/s: Simple machines and mechanical advantages
Lesson Plans Teacher: High School Physical Science Grade: 9th Curricular Areas/s: Simple machines and mechanical advantages Standard/s: Understand and apply knowledge of motions and forces Objects change
Simple and Complex Machines
Simple and Complex Machines A Science A Z Physical Series Word Count: 1,230 Simple and Complex Machines Written by Ned Jensen Visit www.sciencea-z.com www.sciencea-z.com Simple and Complex Machines Key
Mechanical & Electrical Reasoning Study Guide
Mechanical & Electrical Reasoning Study Guide About Mechanical Aptitude Tests Who is likely to take a mechanical reasoning test? Mechanical aptitude tests are commonly administered during pre-employment
Simple Machines. Preparation. Objectives. Standards. Grade Level: 3-5 Group Size: 25-30 Time: 60 Minutes Presenters: 3-4
Simple Machines Preparation Grade Level: 3-5 Group Size: 25-30 Time: 60 Minutes Presenters: 3-4 Objectives This lesson will enable students to: Describe and define simple machines. Identify simple machines
Simple Machines. Student s worksheets. Carles Egusquiza Bueno. IES Rocagrossa Lloret de Mar. CLIL Course. Norwich Institute for Language Education
Simple Machines IES Rocagrossa Lloret de Mar CLIL Course Norwich Institute for Language Education January March 2010 CONTENTS Contents...2 Unit 1: Force, work and machines...3 Lesson 1: Force...4 Lesson
PuLLeys. SaraH TieCK. Simple Machines
PuLLeys i p e m h e SaraH TieCK s m l a c i n s Simple Machines s i m p e m l a c h i n e s PuLLeyS A Buddy Book by SaraH TieCK VISIT US AT www.abdopublishing.com Published by ABDO Publishing Company,
Ropes 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
April Cousins Jessica Denson TEDU 414 Unit Plan Unit Plan: Simple Machines 3 rd Grade Unit Introduction: This unit focuses on use and functions of
April Cousins Jessica Denson TEDU 414 Unit Plan Unit Plan: Simple Machines 3 rd Grade Unit Introduction: This unit focuses on use and functions of simple machines and their importance in our everyday lives.
PHY231 Section 2, Form A March 22, 2012. 1. Which one of the following statements concerning kinetic energy is true?
1. Which one of the following statements concerning kinetic energy is true? A) Kinetic energy can be measured in watts. B) Kinetic energy is always equal to the potential energy. C) Kinetic energy is always
3 Work, Power and Energy
3 Work, Power and Energy At the end of this section you should be able to: a. describe potential energy as energy due to position and derive potential energy as mgh b. describe kinetic energy as energy
PHY231 Section 1, Form B March 22, 2012
1. A car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is 0.20. What is the maximum speed with which the car can safely negotiate
Workshop Stand, Pulleys, Bolts, Pulley String, Pinch Markers, 500g Hooked Mass, 500g Spring Scale, 250g Spring Scale, Meterstick.
Pulleys: Work and Energy Main Topic Subtopic Learning Level Technology Level Activity Type Forces Simple Machines Middle Low Student Teacher s Notes Description: Investigate a complex block-and-tackle
CHAPTER 2 BLOCK AND TACKLE CHAPTER LEARNING OBJECTIVES
CHAPTER 2 BLOCK AND TACKLE CHAPTER LEARNING OBJECTIVES Upon completion of this chapter, you should be able to do the following: Describe the advantage of block and tackle afloat and ashore Blocks pulleys
Force, Work and Energy
Force, Work and Energy Reference Guide Equipment Setup Ropes and Pulleys.................................................................. 1 Investigation Guides A-1 Ropes and Pulleys................................................................
Name. Most of the bones of the limbs (arms & legs) act as levers. These levers are powered by muscles.
Bones as Levers 1 Name Bones as Levers You may not think of your limbs as being machines, but they are. The action of a muscle pulling on a bone often works like a type of simple machine called a lever.
TORQUE AND FIRST-CLASS LEVERS
TORQUE AND FIRST-CLASS LEVERS LAB MECH 28.COMP From Physics, Eugene Hecht and Physical Science with Computers, Vernier Software & Technology INTRODUCTION In Figure 1, note force F acting on a wrench along
9. The kinetic energy of the moving object is (1) 5 J (3) 15 J (2) 10 J (4) 50 J
1. If the kinetic energy of an object is 16 joules when its speed is 4.0 meters per second, then the mass of the objects is (1) 0.5 kg (3) 8.0 kg (2) 2.0 kg (4) 19.6 kg Base your answers to questions 9
Unit 4 Mechanical Systems Learning Pack (Science In Action 8)
1 2 Focus in Action UNIT LEARNING PACKS These booklets are designed to provide Grade 8 students with all the resources needed to review or reinforce concepts, covered in the Alberta Science Curriculum,
Quick and Easy Simple Machine Experiments to Share with Your Kids
Quick and Easy Simple Machine Experiments to Share with Your Kids By Aurora Lipper Pulleys and levers are simple machines, and they make our lives easier. They make it easier to lift, move and build things.
Simple Machines. Integration across the SESE curriculum History Curriculum:
Simple Machines Integration across the SESE curriculum History Curriculum: There are natural links between the theme of Simple Machines and a number of strands in the history curriculum: 1) Continuity
Student Exploration: Pulleys
Name: Date: Student Exploration: Pulleys Vocabulary: effort, load, mechanical advantage, pulley, pulley system Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Suppose you had to haul a
GEARS AND GEAR SYSTEMS
This file aims to introducing basic concepts of gears and pulleys. Areas covered include spur gears, compound gears, chain drive, rack/pinion systems and pulley systems. GEARS AND GEAR SYSTEMS Gears can
At the skate park on the ramp
At the skate park on the ramp 1 On the ramp When a cart rolls down a ramp, it begins at rest, but starts moving downward upon release covers more distance each second When a cart rolls up a ramp, it rises
F N A) 330 N 0.31 B) 310 N 0.33 C) 250 N 0.27 D) 290 N 0.30 E) 370 N 0.26
Physics 23 Exam 2 Spring 2010 Dr. Alward Page 1 1. A 250-N force is directed horizontally as shown to push a 29-kg box up an inclined plane at a constant speed. Determine the magnitude of the normal force,
Linear Motion vs. Rotational Motion
Linear Motion vs. Rotational Motion Linear motion involves an object moving from one point to another in a straight line. Rotational motion involves an object rotating about an axis. Examples include a
BHS Freshman Physics Review. Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science.
BHS Freshman Physics Review Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science. Galileo (1564-1642): 1 st true scientist and 1 st person to use
Work Energy & Power. September 2000 Number 05. 1. Work If a force acts on a body and causes it to move, then the force is doing work.
PhysicsFactsheet September 2000 Number 05 Work Energy & Power 1. Work If a force acts on a body and causes it to move, then the force is doing work. W = Fs W = work done (J) F = force applied (N) s = distance
Work, Energy and Power Practice Test 1
Name: ate: 1. How much work is required to lift a 2-kilogram mass to a height of 10 meters?. 5 joules. 20 joules. 100 joules. 200 joules 5. ar and car of equal mass travel up a hill. ar moves up the hill
Unit 4 Practice Test: Rotational Motion
Unit 4 Practice Test: Rotational Motion Multiple Guess Identify the letter of the choice that best completes the statement or answers the question. 1. How would an angle in radians be converted to an angle
Physics 201 Homework 8
Physics 201 Homework 8 Feb 27, 2013 1. A ceiling fan is turned on and a net torque of 1.8 N-m is applied to the blades. 8.2 rad/s 2 The blades have a total moment of inertia of 0.22 kg-m 2. What is the
Physics 11 Assignment KEY Dynamics Chapters 4 & 5
Physics Assignment KEY Dynamics Chapters 4 & 5 ote: for all dynamics problem-solving questions, draw appropriate free body diagrams and use the aforementioned problem-solving method.. Define the following
Chapter 6 Work and Energy
Chapter 6 WORK AND ENERGY PREVIEW Work is the scalar product of the force acting on an object and the displacement through which it acts. When work is done on or by a system, the energy of that system
Acceleration due to Gravity
Acceleration due to Gravity 1 Object To determine the acceleration due to gravity by different methods. 2 Apparatus Balance, ball bearing, clamps, electric timers, meter stick, paper strips, precision
BOARD OF SUPERVISORS. Lisa M. Garrett, Director of Personnel. To Enrich Lives Through Effective and Caring Service
COUNTY OF LOS ANGELES Department of Human Resources Workforce Planning, Test Research, and Appeals Division 3333 Wilshire Blvd., Ste. 350, Los Angeles, CA 90010 24-Hour Jobline: (800) 970-LIST http://dhr.lacounty.info
PART2Machines. Measuring Work on a Cart on an. Inclined Plane 102. Inclined Plane 104. Inquiry 12.1 Using Pulleys To Do Work 112
TERRY G. MCCREA/SMITHSONIAN INSTITUTION PART2Machines LESSON 11 The Inclined Plane 100 Inquiry 11.1 Inquiry 11.2 Measuring Forces on a Cart on an Inclined Plane 102 Measuring Work on a Cart on an Inclined
At which point on the lever should Gina put the box if she wants to use half as much force to lift it? Point A. Point B. Point C.
2010-2011 HIS Interim ssessment Science Grade 7 Learning Focus: 1.2 Student ate 1 Gina has a long day of moving ahead of her and she wants to save her energy. She would normally need to apply a force of
SpaceActivities. Age 8+ Teacher s Notes. In collaboration with NASA
SpaceActivities Age 8+ Teacher s Notes In collaboration with NASA The Hammer Teaching Objectives: Technology/Engineering Using mechanisms Assembling components Combining materials Science Inclined planes
Tree House Escape. Design Challenge Learning. https://www.thetech.org/educators/design- challenge- learning
A frightened friend is stranded in a treehouse and needs help getting out! In this design challenge students explore how simple machines can make work easier while they design a device to retrieve their
10.1 Quantitative. Answer: A Var: 50+
Chapter 10 Energy and Work 10.1 Quantitative 1) A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 4.8 m above the ground. What is the mass
Ponce de Leon Middle School Physical Science 2016 Summer Instructional Packet
Ponce de Leon Middle School Physical Science 2016 Summer Instructional Packet DIRECTIONS: 1. You are required to complete the Summer Instructional Packet. 2. Turn in your completed package to your teacher,
What is Energy? 1 45 minutes Energy and You: Energy Picnic Science, Physical Education Engage
Unit Grades K-3 Awareness Teacher Overview What is energy? Energy makes change; it does things for us. It moves cars along the road and boats over the water. It bakes a cake in the oven and keeps ice frozen
Chapter 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
Write your answer to question 23 in the space provided on page _ of your Student Response Booklet.
Write your answer to question 23 in the space provided on page _ of your Student Response Booklet. 25907 OR F:4A Q:23 Sect:B Content:50 Linking Artid: 25907bike Bicycle Design Use the illustration of a
FRICTION, WORK, AND THE INCLINED PLANE
FRICTION, WORK, AND THE INCLINED PLANE Objective: To measure the coefficient of static and inetic friction between a bloc and an inclined plane and to examine the relationship between the plane s angle
Chapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces. Copyright 2009 Pearson Education, Inc.
Chapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces Units of Chapter 5 Applications of Newton s Laws Involving Friction Uniform Circular Motion Kinematics Dynamics of Uniform Circular
Two-Body System: Two Hanging Masses
Specific Outcome: i. I can apply Newton s laws of motion to solve, algebraically, linear motion problems in horizontal, vertical and inclined planes near the surface of Earth, ignoring air resistance.
force (mass)(acceleration) or F ma The unbalanced force is called the net force, or resultant of all the forces acting on the system.
4 Forces 4-1 Forces and Acceleration Vocabulary Force: A push or a pull. When an unbalanced force is exerted on an object, the object accelerates in the direction of the force. The acceleration is proportional
Name Period WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS. 1. Stored energy or energy due to position is known as energy.
Name Period Date WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS 1. Stored energy or energy due to position is known as energy. 2. The formula for calculating potential energy is. 3. The three factors
Technological Studies
1 Features of machines... 2 (a) Load and effort... 3 (b) Mechanical Advantage... 3 (c) Velocity Ratio... 4 (d) Work done... 5 (e) Efficiency... 6 2 Classifications of motions... 7 (a) Linear motions...
PUTTING THE SIMPLE IN SIMPLE MACHINES
CORE KNOWLEDGE NATIONAL CONFERENCE ORLANDO, FLORIDA APRIL 29 - MAY 1, 1999 PUTTING THE SIMPLE IN SIMPLE MACHINES Grade Level: Presented by: Length of Unit: Second Lou Tucker, Donna Cueto, Ridge View Elementary,
Chapter 6. Work and Energy
Chapter 6 Work and Energy ENERGY IS THE ABILITY TO DO WORK = TO APPLY A FORCE OVER A DISTANCE= Example: push over a distance, pull over a distance. Mechanical energy comes into 2 forms: Kinetic energy