EnergyEnergy

Kim Lachler

2010NCES 6.P.1

HeatHeat

LightLight

SoundSound

What is Energy?What is Energy?

the ability to workthe ability to work

Energy_As_Work.mov

So what is work?So what is work?when a force causes an object to move in when a force causes an object to move in the direction of the force.the direction of the force.

Work = force X distanceWork = force X distance

Energy is transferred from the first object Energy is transferred from the first object to the second object, so that it can do to the second object, so that it can do work. work.

How is energy measured?How is energy measured?Energy is measured in Energy is measured in Joules (J)Joules (J)

(1 J = amount of energy it takes to lift an (1 J = amount of energy it takes to lift an objectobject

that weighs 0.445 pounds {1 Newton} 1 meter)that weighs 0.445 pounds {1 Newton} 1 meter)

Three main types of energyThree main types of energy

Kinetic EnergyKinetic Energy

energy in motionenergy in motion

Kinetic energy = Kinetic energy = mvmv22

22

m = mass v = velocitym = mass v = velocity

Kinetic_and_Potential_Energy.mov

Three main types of energyThree main types of energy Potential energyPotential energy

energy an object has because of its positionenergy an object has because of its position

Gravitational potential energyGravitational potential energy – the force of gravity – the force of gravity working on an object working on an object

Gravitational potential energy = weight x heightGravitational potential energy = weight x height

Elastic potential energyElastic potential energy – energy stored in a – energy stored in a stretched rubber bandstretched rubber band

Three main types of energyThree main types of energyMechanical energyMechanical energy

total energy of motion and position of an total energy of motion and position of an objectobject

Mechanical energy = potential energy + kinetic Mechanical energy = potential energy + kinetic energyenergy

The mechanical energy remains the same.The mechanical energy remains the same. As potential energy increases the kinetic As potential energy increases the kinetic energy decrease.energy decrease.

Or as the potential energy decreases the Or as the potential energy decreases the kinetic energy increaseskinetic energy increases

6 other forms of energy6 other forms of energyThermal energy Thermal energy

kinetic energy due to random kinetic energy due to random motion of particles that make up motion of particles that make up an objectan object

6 other forms of energy6 other forms of energyChemical energyChemical energy

potential energy based on the potential energy based on the arrangement of atomsarrangement of atoms

6 other forms of energy6 other forms of energyElectrical energyElectrical energy

potential energy based on moving potential energy based on moving electrons being ready to be usedelectrons being ready to be used

6 other forms of energy6 other forms of energySound energySound energy

potential energy changing to kinetic potential energy changing to kinetic energy through vibrationsenergy through vibrations

6 other forms of energy6 other forms of energyLight energyLight energy

Similar to sound energy - potential Similar to sound energy - potential energy changing to kinetic energy energy changing to kinetic energy through vibrationsthrough vibrations

6 other forms of energy6 other forms of energyNuclear energyNuclear energy

Nucleus of atoms contain huge Nucleus of atoms contain huge amounts of potential energyamounts of potential energy

Nasa, electromagnetic spectrum Nasa, electromagnetic spectrum http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.htmlhttp://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html, accessed 12/16/2010, accessed 12/16/2010

Media College. COM, How Sound Waves Work, Media College. COM, How Sound Waves Work, http://www.mediacollege.com/audio/01/sound-waves.htmlhttp://www.mediacollege.com/audio/01/sound-waves.html, accessed 12/16/2010, accessed 12/16/2010

Cool Cosmos, What is Heat?. Cool Cosmos, What is Heat?. http://coolcosmos.ipac.caltech.edu/cosmic_classroom/light_lessons/thermal/heat.htmlhttp://coolcosmos.ipac.caltech.edu/cosmic_classroom/light_lessons/thermal/heat.html, accessed , accessed 12/16/201012/16/2010

KEEP, What is Energy?, KEEP, What is Energy?, http://www.uwsp.edu/cnr/wcee/keep/Mod1/Whatis/energymeasures.htmhttp://www.uwsp.edu/cnr/wcee/keep/Mod1/Whatis/energymeasures.htm, , accessed 12/17/2010accessed 12/17/2010

Discovery Education, Clip Art Gallery, Discovery Education, Clip Art Gallery, http://school.discoveryeducation.com/clipart/category/anim.html, accessed 12/17/2010http://school.discoveryeducation.com/clipart/category/anim.html, accessed 12/17/2010

Holt,Rinehart and Winsteon, North Carolina Holt Science & Technology, Holt,Rinehart and Winsteon, Holt,Rinehart and Winsteon, North Carolina Holt Science & Technology, Holt,Rinehart and Winsteon, New York, 2005New York, 2005

Discovery Education, Discovery Education, http://http://discoveryeducation.comdiscoveryeducation.com, accessed 12/28/2010, accessed 12/28/2010