for 9th grade physics, chapter 6 "energy transformations and energy transfers"

EnergyEnergy

What are potential What are potential and kinetic energy?and kinetic energy?

First some review…First some review…

Write down the definition Write down the definition of energy.of energy.

Write down the four of the Write down the four of the seven types of energy and seven types of energy and an example of each.an example of each.

Energy…Energy…

……is the ability to make is the ability to make things movethings move

The seven types of The seven types of energy…energy…

Chemical - gasoline, Chemical - gasoline, Light – flash light, Light – flash light, Heat – burner on a stove, Heat – burner on a stove, Nuclear - sun, Nuclear - sun, Mechanical - car, Mechanical - car, Sound – music on the radio, Sound – music on the radio, Electrical - lightningElectrical - lightning

DefinitionsDefinitions

Kinetic EnergyKinetic Energy: the energy : the energy of motionof motion

Potential EnergyPotential Energy: stored : stored energyenergy

A Roller CoasterA Roller Coaster

A roller coaster speeds A roller coaster speeds along its track. It has along its track. It has kinetic energykinetic energy because it is because it is movingmoving. .

A Roller CoasterA Roller CoasterAs it slows to a stop at As it slows to a stop at

the top of a hill, it has the top of a hill, it has potential energypotential energy because because of of wherewhere it is. It has the it is. It has the potential to move because potential to move because it is above the ground and it is above the ground and has somewhere to go.has somewhere to go.

What type of energy is What type of energy is this?this?

(Remember the seven (Remember the seven types?)types?)

Right, mechanical.Right, mechanical.

What if the cars What if the cars crashed and burned? crashed and burned?

What type would it be?What type would it be?

Right, heat.Right, heat.

Substances like wood, Substances like wood, coal, oil, and gasoline have coal, oil, and gasoline have storedstored energy energy because of because of their chemistry – they can their chemistry – they can burnburn

Stored energy Stored energy isis potential potential energyenergy

Potential EnergyPotential Energy can be can be changed into changed into Kinetic Kinetic EnergyEnergy

Also Also Kinetic EnergyKinetic Energy can be can be changed into changed into Potential Potential EnergyEnergy