What are potential and kinetic energy?

Energy… …is the ability to cause change

Two Types of Energy Kinetic Energy: the energy of motion Potential Energy: stored energy

The seven forms of energy… Chemical - gasoline, Electromagnetic – flash light, Thermal – burner on a stove, Nuclear - sun, Mechanical - car, Sound – music on the radio, Electrical - lightning

A Roller Coaster A roller coaster speeds along its track. It has kinetic energy because it is moving.

A Roller Coaster As it slows to a stop at the top of a hill, it has potential energy because of where it is. It has the potential to move because it is above the ground and has somewhere to go.

What form of energy is this? (Remember the seven forms?)

Right, mechanical. What if the cars crashed and burned Right, mechanical. What if the cars crashed and burned? What form would it be?

Right, thermal.

Substances like wood, coal, oil, and gasoline have stored energy because of their chemistry – they can burn Stored energy is potential energy

Energy Transformation Potential Energy can be changed into Kinetic Energy Also Kinetic Energy can be changed into Potential Energy

Law of Conservation of Energy Energy cannot be created or destroyed. It can only change forms. All the energy in a closed system always add up to the same total amount of energy.