Drill

•Why is a pendulum a good example of an energy conversion of PE to KE?

Energy Forms and Transformations

Objective:

examine the various forms of energy in order to identify and describe specific energy transformations.

Energy

• The stuff that makes stuff do stuff

OR

• The ability to do work.

• W=F(d)(F=force d=distance)

Engage

•What enables the match to burn?

Types of Energy

•KE

•PE

Forms of energy• Mechanical• Heat/Thermal• Chemical• Electrical• Electromagnetic• Nuclear

Mechanical Energy

• Energy of motion or position

• Sound• Anything moving• KE or PE• Not 100%

efficient much lost to heat

Heat/Thermal Energy• The internal motion

of an objects atoms and molecules.

• Measured by temperature.

• The faster particles move, the more energy they have.

• KE only

Chemical Energy

• Energy stored by chemical bonds in an object.

• When bonds are broken energy is released.

• When new bonds are formed energy is absorbed

• PE only

Electrical Energy

• Moving electrical charges.

• Electricity

Electromagnetic Energy

• Travel in waves.• Light energy is a

form.• Magnetism is

product.• X-Rays• Radio waves• Gamma Waves

Nuclear Energy

• Energy stored in center(nucleus) of an atom

• Released in fission (breaking apart)

• Released In fusion (putting together)

• The sun is powered by this• Most powerful• PE only