Post on 13-Dec-2015
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