1. Energy

2. The ability to do work and overcome resistance. The ability to cause change.

3. Energy Work – The relationship between force on an object and distance moved. W = Fd Work = Force · Distance

4. Energy Unit of Energy = Joule Since the unit of force is a Newton and distance is measured in meters, a Joule is a N · m. James Prescott Joule 1818 -1889

5. Work – Energy Theorem W = ∆ E K

6. Energy Energy is Classified as either Potential or Kinetic Energy.

7. Energy Potential Energy is stored energy due to: Chemical Composition Mass and Position Elasticity

8. Energy Gravitational Potential Energy depends on an object’s mass, height and acceleration due to gravity. U g = mgh

9. Energy What is the gravitational potential energy of a 57 kg rock on a 125 m hill?

10. Energy Elastic Potential Energy is energy stored in an object that is stretched or compressed.

11. Energy What is the elastic potential energy of a spring that has been compressed 0.22 meters with a force of 3.5N? 3.5N 0.22m

12. Energy Kinetic Energy is energy of motion. It depends on an object’s mass and velocity. KE = ½ mv 2

13. Energy What is the kinetic energy of a 800Kg bobsled moving at 15 m/s?

14. Energy Backyard Examples of Work and Energy (Problems w/ Calculations) http://www.youtube.com/watch?v=oyPOCSEJWP4

15. Energy Law of Conservation of Energy The total amount of energy in a system is conserved. [Energy can neither be created nor destroyed, only changed forms].

16. Conservation of Energy Lego – PE, KE and Energy Conservation http://www.youtube.com/watch?v=ZEajHxTM1CE&feature=related Divers http://www.youtube.com/watch?v=KqQ83CPH3i8

17. Energy Usually named for the source of the force involved. MechanicalNuclear ChemicalElectromagnetic Thermal(incl. electricity & magnetism) Into to Types of Energy http://www.youtube.com/watch?v=z7lCkQV7GEE&feature=related

18. Energy Mechanical Energy – Application of a force by the movement of objects or particles.

19. Energy Chemical Energy – Contained within the chemical bonds of molecules.

20. Energy Electromagnetic Energy – Energy that travels as waves.

21. Electromagnetic Energy Electricity – Force applied by electrons.

22. Electromagnetic Energy Magnetism – Force applied by magnetic field.

23. Electromagnetic Energy Electricity and Magnetism are related.

24. Energy Nuclear Energy – Energy contained within the nucleus of an atom. FissionFusion Splitting the atom. Combining Nuclei

25. Nuclear Fusion

26. Energy Thermal Energy – The total internal energy of a substance. Dictates the amount of particle motion.

27. Energy Remember: Energy can change forms. Ex. Mechanical  Electrical

28. Energy Conversions What type of energy operates the toy duck? Describe the energy transformations that gave the duck its energy.

29. Energy Resources Non-Renewable – Sources that take extremely long periods to develop –Fossil Fuels –Uranium Renewable (AKA Alternative) – Sources that can be easily replenished. –Solar –Wind –Hydroelectric –Geothermal –Biomass –Fuel Cells

30. Non-Renewable Energy Resources Fossil Fuels – Derived from decayed organic matter. [ Coal, Oil, Natural Gas ]

31. Non-Renewable Energy Resources

32. Nuclear - Radioactive elements that emit thermal energy upon decay.

33. Renewable Energy Sources Solar – Energy converted from electromagnetic energy to electricity of thermal energy. Thermal CollectorPhotovoltaic Cell

34. Renewable Energy Sources Solar Arrays

35. Renewable Energy Sources Wind – Mechanical Energy derived from the kinetic energy of moving air particles.

36. Renewable Energy Sources Hydroelectric - Mechanical Energy derived from the kinetic energy of moving water particles.

37. Renewable Energy Sources Hydroelectric

38. Renewable Energy Sources Geothermal – Using thermal energy from the Earth.

39. Renewable Energy Sources Geothermal – Using thermal energy from the Earth.

40. Renewable Energy Sources Biomass - Using the energy stored in organic matter to generate other forms of energy.

41. Renewable Energy Sources Fuel Cells – Electricity generated by forcing hydrogen through a charged membrane. Fuel Cell Animations http://www.upsaps.com/index.php?categoryID=146 http://www.youtube.com/watch?v=_MsG9REFN3s

42. Renewable Energy Sources Fuel Cell Automobile

43. Renewable vs. Non-Renewable Energy Resources Considerations : Cost / Benefit Availability / Sustainability

44. Energy New Energy Source