Energy

What is Energy• Energy is the ability to

cause change or do work

• TYPES– Electrical – Chemical– Radiant– Thermal– Mechanical– Thermal– Nuclear

Potential and Kinetic

Potential• Stored energy• Due to height or

position• Has potential

to change

Kinetic• Energy of motion• Depends on mass and

speed

Potential Energy

• Elastic potential – stored energy in something that can stretch or compress

• Chemical potential – stored energy in the chemical bonds

• Gravitational potential – stored energy due to position above the earth (they have ability to fall) depends on height

Law of Conservation of Energy• Energy can not be created or destroyed it can

only change forms

• If I put gas in my car, the chemical energy in the gas converts to mechanical energy to power the car some of the energy is given off as thermal energy

• REMEMBER – friction turns energy to heat – thermal energy

Energy Transformations

• The flow of energy from one type to another through a system or series of events

• Example– Chemical energy (CE) in

ice cream → mechanical energy (ME) in your body → mechanical energy of the bike

Energy Types • Electrical Energy (EE) – anything that uses

electricity• Chemical Energy (CE) – energy in bonds –

food, burning• Mechanical Energy (ME) – anything with

moving parts• Radiant Energy (RE) – light• Thermal Energy (TE) – heat• Nuclear Energy (NE) – radioactive

Transformations

Transformations

Transformations