ENERGY The measure of the ability to do work Conservation of energy -energy can change forms but can not be destroyed -the total amount of energy in the.

Slides:

Advertisements

Similar presentations

Ch 8 Energy Notes ENERGY.

Advertisements

Unit 7 Energy.  Energy is the ability to do work or cause change. I can work…but I won’t.

Energy Kinetic and potential Energy can be classified as potential or kinetic Potential energy: energy of position Potential energy: energy of position.

Unit 5-2: Energy. Mechanical Energy When mechanical work is done, mechanical energy is put into or taken out of an object. Mechanical energy is a measurement.

Energy. A. Energy Definition The ability to do work.

Work and Power. We have learned about: We have learned about: Acceleration Acceleration Newton Newton Force Force Speed Speed Velocity Velocity Vectors.

Notes on Chapter 8 Work & Energy

Integrated Science Unit 2, Chapter 5.

Tuesday, September 29, 2009 In olden days, something was only considered “doing work” if you were getting tired or sweaty doing it. Make up a definition.

Energy Kinetic and potential Forms of Energy Mechanical - energy with which moving objects perform work Ex: bicycle, sound Mechanical - energy with which.

Writing prompt – 10/13/06 IN COMPLETE SENTENCES: Write down the order of changes in energy that happens when plucking a guitar string. (longest chain of.

What is the relationship between kinetic and potential energy?

Work, Power and Momentum PSC1341 Chapter 3 Work Work = Force times Distance Force is a vector quantity and only that part of the force that is parallel.

IGCSE Coordinate Science 1 P3: Energy, Work, and Power Unit 7 – part 1.

Mechanical Energy Ch. 4. Energy Is the ability to do work. Energy = work Units = Joules (J) James Prescott Joule.

Physics 3.3. Work WWWWork is defined as Force in the direction of motion x the distance moved. WWWWork is also defined as the change in total.

Unit 2 Lesson 2 Kinetic and Potential Energy

Work and Energy.

CHAPTER 10 WORK, ENERGY, AND POWER. STANDARDS SP3. Students will evaluate the forms and transformations of energy. a. Analyze, evaluate, and apply the.

Energy Chapter 7.

Agenda 9/30 wed Reminder Make sure your Classwork /Homework Packets are in Fill in Grade sheet due Friday Today: 1. Ch 3 notes Energy (keep due when the.

Motion and Forces Work and Energy Chapter 4. Bell Work 2/18/10 Write each statement, then decide if the statement is true or false, if false correct it.

The BIG idea Energy is transferred when a force moves an object. Work and Energy Work is the use of force to move an object. 4.1 Energy is transferred.

Work and Energy Ch. 9.3 What is Energy?.

CHAPTER - 11 WORK AND ENERGY CLASS :- IX. 1) Work :- Work is said to be done when a force acts on an object and the object is displaced in the direction.

Chapter 6 Energy Energy Universe is made up of matter and energy. Energy is the mover of matter. Energy has several forms: –Kinetic, Potential, Electrical,

Unit 8 (Chapter 10 & 11) Work, Energy and Power. Work “Work” means many things in different situations. When we talk about work in physics we are talking.

Formulas. Work Units – joules (J) Power Units – watts (w)

Section 15.1Energy and Its Forms

Unit 5: Energy Intro to energy notes. What is energy? Energy is the ability of a physical system to do work Energy takes many forms – The movement of.

ICP “Work, Energy and Momentum”. NGSS HS-PS3-1 Create a computational model to calculate the change in the energy of one component in a system when the.

ICP “Work, Energy and Momentum”. Core Content l SC-HS l Students will: select or construct accurate and appropriate representations for motion (visual,

Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.

Energy Energy Universe is made up of matter and energy. Energy is the mover of matter. Energy has several forms: –Kinetic –Potential –Electrical –Heat.

Hosted By Mrs. Hynes Forms of Energy Energy Conversions Conservation of Energy Units & Formulas

Energy and Work Part 2. What is Work Work is the transfer of energy through motion –When force acts over a distance in the direction of an object’s motion.

Work and Energy 1.What is work? 2.What is energy? 3.What does horsepower and torque of an engine tell you about a car?

Energy Notes Energy is one of the most important concepts in science. An object has energy if it can produce a change in itself or in its surroundings.

Aim: How can we apply work- energy to motion problems? Do Now: In your own words, what does energy mean to you? In your own words, what does energy mean.

WORK, POWER AND ENERGY. WORK Work is done ONLY when a force moves an object Work is a force acting over a distance If an object does NOT move when a force.

Work = work is done when a net force on an object causes it to move a distance W = Fd Or Work (measured in joules) = Force (N) times Distance (m) Is work.

Energy and Work. Work… Work = Force // x Displacement W = F // x d ** Remember that displacement is the distance AND direction that something moves. It.

ENERGY. Potential energy is energy due to position. Systems or objects with potential energy are able to exert forces (exchange energy) as they change.

Unit 2 Lesson 2 Kinetic and Potential Energy

PE Definition Stored Energy Energy due to position.

Unit 2 Lesson 2 Kinetic and Potential Energy

Work and Energy.

Unit 2 Lesson 2 Kinetic and Potential Energy

KE and PE Practice Quiz Solutions.

Energy IN = Energy OUT Means ALL Energy

Work, Power, & Energy.

Nature of Energy Chapter 4.1.

Work Force (N) Work (joules) W = F x d Distance (m)

Energy Conversion and Conservation

WORK, POWER AND ENERGY! (ACCORDING TO PHYSICS)

Force and Motion Vocabulary

Work and Energy.

Energy comes in many forms: mechanical, electrical , magnetic, solar,

Physical Science Ch. 15: Energy.

Work and Energy Come in and get out your notes Journals and a paper off the blue bookshelf !

Energy IN = Energy OUT Means ALL Energy

Force and Motion Vocabulary

The Fundamental Physical Quantities

Objectives Define work in terms of energy.

Ch 4 Energy Kinetic Energy (KE) – the energy a moving object has because of its motion; depends on mass and speed of object KE = mv2/2 Joule – SI unit.

Presentation transcript:

ENERGY The measure of the ability to do work Conservation of energy -energy can change forms but can not be destroyed -the total amount of energy in the Universe remains constant!!!!!!!!!!!!!!!! -matter acts the same way (total amount remains constant) **Energy is measured in Joules (label, unit)

Potential and Kinetic Energy Potential energy of an object -stored, ready to use energy -could be because of chemical composition -could be because of position of the object -to calculate chemical potential energy of an object --measure the amount of chemicals in the object The amount of potential energy an object contains is the amount of work the object could do to another object

-to calculate position energy of an object -measure mass x 9.8m/s 2 x height lifted kilogram x gravity(use 10) x meter balance scale x constant x meter stick Kinetic energy of an object -determined by an object’s motion -kinetic energy is the work an object is doing on another object -to calculate motion energy

½ x mass x velocity x velocity.5 x kg x (speed and direction) 2 meters/seconds Velocity is a vector -vectors explain magnitude and direction of an object’s motion -magnitude --how fast -direction --which way -used to predict where the object will be in the future (graph)

The potential energy of an object is equal to the kinetic energy or work that it takes to gain that energy Then it will have that much potential energy to use Other examples

Work and Energy The label for energy and work is Joule Joule = Newton x meter force x distance -to find distance --measure with a meter stick -to find force --use a spring scale -force is an amount of weight -gravity pulling on mass creates weight (force) The word work is interchangeable for the words potential and kinetic energy

Mass x gravity = force Kilogram x 9.8m/s 2 = Newton For work to be done, the object must move in the direction of the applied force

Problems to do Kinetic energy problems -1/2MV 2, Joules 1)M = 2kg, V = 10m/s, V = North KE or work being done = ? Joules 2)Meters = 2, seconds = 1, Mass = 4kg. down KE or work being done is = ? Joules

Potential energy problems --mgh, Joules 3) mass = 10kg., height = 5 meters PE or Work it can do is = ? Joules Energy/ Work Problem F X D, Joules (Newton Meters) 4) Force = 30 Newtons, Distance = 5 meters Work or Energy = ? Joules 5) Mass = 10kg., distance = 10meters Work or Energy = ? Joules

Power Rate of work done To calculate -work/time (work divided by time) Work / time Joule seconds Newton X meter force distance Kilogram X 9.8m/s 2 mass X acceleration rate due to gravity

Power is measured in Watts -label Kilowatt hour -how much energy is used in an hour -how electric bill is calculated

Power Problem –Work/time, Watts 6) Workdone = 150Joules, time =50seconds Power = ? 7) Force = 20Newtons, distance =.5meters, time = 1 hour (seconds) Power = ?

Answers 1)(.5) x (2) x (100) = 100Joules, North 2)(4kg) x (2/1 = 2 2 = 4) x (.5) = 8Joules, down 3)(10) x (9.8) x (5) = 490Joules 4)(30) x (5) x = 150Joules 5)(10kg.) x (9.8) x (10) = 980Joules Force 6)150/50 = 3Watts 7)(20Newtons)x(.5meters)/3600sec.=.0028Watts 60sec. In a min.X 60min. In an hour = 3600sec.