Energy, Friction & Efficiency.  Energy = the ability to do work  When work is done, energy is used  Work is the transfer of energy.

Slides:



Advertisements
Similar presentations
Work Work: Work is said to be done when the point of application of a force moves and it is measured using the product of force and the distance moved.
Advertisements

Energy Energy: Energy is the capacity of a body to do work.
Energy The ability to cause a change.
Unit 4: Alternative Energy Topic 1:Energy Power & Energy 3201.
Notes: Chapter 9 Energy Objectives 1.Define and describe work (9.1) 2.Define and describe power (9.2) 3.Define mechanical energy. (9.3) 4.Define potential.
Chapter 5 ENERGY. What is the ability to do work? 1.Kinetic energy 2.Potential energy 3.Mechanical energy 4.Energy.
ENERGY REVIEW. What is energy? The ability to do work or make change in matter.
Our BIG question: HOW MUCH ENERGY IS IN AN EARTHQUAKE ?
Chapter 3 Different Forms of Energy. What is energy? Energy: the ability to do work or effect change.
ENERGY Energy Energy is the ability to do work.
Energy Exercises 1.a) kinetic b) potential c) gravitational potential, kinetic d) chemical, heat and light e) store 2a) potential b) kinetic c) kinetic.
Conservation of Energy
Chapter 9 Preview Section 1 What Is Energy?
ENERGY Conversions.
Energy  The ability to do work  Work is done when a force moves an object over a distance.
Energy Lesson Goal: Explain the different forms of energy that are present while on a roller coaster and what those forms of energy turn into. At the.
Finish the following sentence: “Energy is the ability to ____.”
Energy Transformations!
Energy. What is Energy Energy is the ability to cause change or do work TYPES – Electrical – Chemical – Radiant – Thermal – Mechanical – Thermal – Nuclear.
JC Physics A. Roche What is Energy? Energy is the ability to do work or move something. Energy is measured in Joules (J).
All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy.
Chapter 9 Energy and Energty Resources. Conservation of Energy 9:3.
Energy.
Chapter 10 & 11 Energy & Work. Energy The capacity of a physical system to perform work. Can be heat, kinetic or mechanical energy, light, potential energy,
Energy. Energy & Work Closely related Energy: ability to do work Work: transfer of energy Both measured in Joules.
Start Misc. 1.
What is energy?.  Energy- the ability to do work  When one object does work on another object, energy is transferred from the first object to the second.
Energy and Energy Resources Carin Miranda Smyrna Middle School Fall 2009.
Unit 4 Mechanical Systems Topic 3 Energy, Friction, Efficiency Remember to name and date your notes!
Unit 4 Mechanical Systems Topic 3 Energy, Friction, Efficiency.
Unit 2 Energy. Energy Transformations Law of Conservation of Energy Energy cannot be created or destroyed only transformed to another type of Energy.
Hosted by Type your name here Choice1Choice 2Choice 3Choice
ENERGY BASICS.
ENERGY.
Energy - The Ability To Cause Change -. Kinetic Energy  energy due to motion  Kinetic Energy and Speed  the faster an object moves, the more kinetic.
Ch.9, Sec.3 – Conservation of Energy Where Does the Energy Go? Where Does the Energy Go?  friction: a force that opposes motion between two surfaces that.
Chapter 13 Energy.
Energy and Energy Resources Sections 1 and 2. What is Energy? The ability to do work Involves motion or position Work occurs when a force causes an object.
Forms of Energy Mr. Dunnum Physical Science. Law of Conservation  According to the lawlaw of conservationlawla of energy, energy is never created or.
Types of Energy Chapter 9. What is Energy? Energy is the ability to do work.
Work and Power Notes What Work and Power are not… Work is not where you go to earn a check! Power is not how strong you are!
Energy POTENTIAL AND KINETIC. Objectives  Explain the concepts of kinetic and potential energy.  Understand that energy can change from one form into.
Energy Review. The ability to do work is power 2.conversion 3.energy 4.velocity
Potential and Kinetic Energy. What is energy?! Capacity to do work Measured in joules (J)
ENERGY Ability to do work or cause change. Potential Stored energy. Has the ability to move. It might move, it might not move.
WORK, ENERGY & POWER. Work  A measure of the amount of energy transformed from one form to another  For example, work is done when energy is used to.
Changing Energy Forms. How can energy change? Energy –The ability to cause change or to do work.
1 Energy Transformations. Forms of Energy Potential (stored) Gravitational potential Elastic potential Chemical potential Kinetic (motion) Mechanical.
How to Use This Presentation To View the presentation as a slideshow with effects select “View” on the menu bar and click on “Slide Show”, or simply press.
1 2 Energy is something that is needed to make things happen. Energy can make things move or change. Energy is not a substance or an object that you.
Which of the following is a conversion from light energy to chemical energy? A. Turning on a stove to heat dinner. B. Making toast in a toaster. C. Growing.
ENERGY. Where Does the Energy Go? Friction is a force that oppose motion between two surfaces that are touching. For a roller coaster car to move, energy.
Energy and Its Forms Energy = ability to do work Work = when a force moves an object through a distance, transfer of energy.
Forms of Energy. Law of Conservation of Energy never Energy is never created or destroyed, it only changes form!
ENERGY! And Energy Transmission. Lets first review Work  Work = Force (N) x Distance  In every simple machine that we have seen, when someone does work.
Do Now Nov. 4th In your Do Now Book, list ways that you used energy this morning.
Energy Conversions & Conservation. Bellringer  Where does the energy that makes a roller coaster car move come from? Where does the energy go?
Heat = mass X change in temp X specific heat 1.10 g X 33 o C X 0.90 J/g o C = 297 J g X  T X 0.50 J/g o C = 5275 J 1.25  T = 5275 – divide both.
CHAPTER 2 ENERGY. 1. Visible light is an example of Electromagnetic energy 2. Change from one energy form to another is Energy transformation.
Unit 5: Work, Power and Energy. Work Work is done when a force causes a change in motion of an object, or work is a force that is applied to an object.
Warm-up Energy Reading What are the different types of energy? How is energy transferred or transformed? Lesson Essential Question.
The Nature of Energy. What is Energy The ability to do work or cause a change is called energy. When an organism does work some of its energy is transferred.
Types of Energy & Energy Conversions
RED What is the formula for Gravitational Potential Energy? (GPE) GPE=wh or g(m)h What is energy efficiency? Energy efficiency is the ratio of input energy.
Ch.9, Sec.3 – Conservation of Energy
Topic 3 – Energy, Friction, and Efficiency
Energy and Energy Resources
Integrated Science Unit 7 - Physics
Presentation transcript:

Energy, Friction & Efficiency

 Energy = the ability to do work  When work is done, energy is used  Work is the transfer of energy

The Law of Conservation of Energy  Energy can’t be created or destroyed, it has to come from somewhere  What are some sources of energy?

Which form of energy powers most of our machines?  Thermal (heat)  Electrical  Mechanical (our muscles)  Chemical (gas)  Sound  Elastic  Magnetic  Nuclear  Solar

 When something is moving it has Kinetic Energy  Potential Energy is stored energy due to position or condition  Chemical potential energy: a battery, food, fuel  Electrical potential energy: a battery  Gravitational Potential Energy: a skier on top of hill, a rock on top of hill, water in a dam (hydro electrical)

For Example  A backhoe lifts the dirt out of a hole  Work: moving the dirt upward against the force of gravity uses: chemical energy (fuel) kinetic energy (shovel)  What kind of energy does the dirt have once it is in the air?

Transmission  Energy can be converted from one form to anther or it can be transmitted  Transmission: energy is transferred from one place to another but no energy is changed or converted Ex. bike: energy from one sprocket to another Ex. electrical wires: from generating station to house

Friction  Friction is the resistance of motion when the surfaces of two objects come into contact  Friction opposes motion so you will never get the same amount of work out of a machine as the effort put in it  The lost work appears as heat or sound

 Many machines require very little friction and need to be lubricated with oil or grease Ex. rollerblades, pistons in a car  Some machines depend on friction to work properly Ex. erasers, car brakes, parachutes

Efficiency  Efficiency is a comparison of the useful work provided by a machine to the work supplied to the machine  The higher the efficiency, the better the machine is at transferring energy Efficiency = work done by a lever on a load x 100% work done on a lever by effort force

 Work done on a machine = work done by the machine + energy lost to friction

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.