3. Def: Ability to cause change in a system Unit  joulesUnit  joules Symbol  ESymbol  E

4. Energy can be transformed from one form to another. UV

5. Energy is energyEnergy is energy There are no different kindsThere are no different kinds There are simply different ways of storing energy within a systemThere are simply different ways of storing energy within a system For Example: You can store information in a book, on a computer hard drive or CDYou can store information in a book, on a computer hard drive or CD No matter how it is stored it is the same informationNo matter how it is stored it is the same information

6. The 2 Major Types are Mechanical & InternalThe 2 Major Types are Mechanical & Internal E T = E mec + E intE T = E mec + E int The Total Energy (E T ) of a “closed” system is equal to the sum of its mechanical and internal energies Can change motion Energy of the particles

7. Def: Can cause a change in motion EmEmEmEm

8. Def: The energy stored with the actual motion of the object depends on mass and velocitydepends on mass and velocity EkEkEkEk

9. Def:energy due to the of the system Def: energy due to the position of the system relative to another object usually involves a ‘field’ (i.e. - gravity, magnets, etc.)

10. Def: Def: energy due to an object’s position (height) above the ground Depends on mass and distance (height)

11. Def:energy due to a system beingDef: energy due to a system being stretched or compressed

13. Def:energy due to position in an electric or magnetic field Def: energy due to position in an electric or magnetic field

14. Energy is not stored in the bond Atoms store the energy due to their position relative to each other Internal Energy

15. Internal energy that the system does not use again is called Dissipated Energy Symbol: DE or E D Usually from friction or when the object is deformed

17. The big picture so far…

18. A curling iron heating on the edge of the counter. A magnet holding family pictures of the refrigerator. A sling shot just in launch position. Hockey puck slowing down on an ice rink. A rock falling off a steep cliff. A child sliding down a playground slide. GPE E&M GPE E&M ELPE KE DE KE GPE KE GPE DE Word Bank KE GPE ELPE E & M DE

20. System (it): only the factors we are paying attention toSystem (it): only the factors we are paying attention to Surroundings: everything elseSurroundings: everything else You MUST define your system

21. Bar Graphs are used to represent how energy is stored in a system Your set up will look like this: Initial Bar Graph Final Bar Graph GPE KE ELPE DE System Definition GPE KE ELPE DE

22. A ball is held at rest 1m above the ground and it is then released and has fallen halfway to the ground Initial Bar Graph Final Bar Graph GPE KE ELPE DE System Definition GPE KE ELPE DE

23. The total energy of a remains constant. The total energy of a “closed system” remains constant. means no energy enters or leaves the system“Closed system” means no energy enters or leaves the system Newton’s Cradle

25. Open system, the real world, KE causes friction, skater eventually comes to a stop

26. The total energy did not change.The total energy did not change. Some of the energy got shifted from mechanical energy to internal energy.Some of the energy got shifted from mechanical energy to internal energy. KE  Thermal EnergyKE  Thermal Energy

27. A curling iron heating on the edge of the counter. A magnet holding family pictures of the refrigerator. A sling shot just in launch position. Hockey puck slowing down on an ice rink. A rock falling off a steep cliff. A child sliding down a playground slide. GPE E&M GPE E&M ELPE KE DE KE GPE KE GPE DE

29. What types of energy are shown below? Mechanical and Dissipated Energy (friction)

30. What type of energy is shown below? Chemical Energy

31. What types of energy are shown below? Electrical, Mechanical and Electromagnetic Energy

32. What type of energy is shown below? Chemical Energy (yummy)

33. What type of energy storage is shown below? Thermal Energy

34. Draw a flow map showing the flow of energy transformations in a car from starting vehicle to driving. You should have 5 different types of energy.

35. Energy Transfer Chemical Electrical Sound (mechanical) Light (Electromagnetic) Thermal Mechanical

37. Kinetic Energy KE = ½ mv 2KE = ½ mv 2 Changing velocity affects KE more than changing massChanging velocity affects KE more than changing mass

38. How much kinetic energy does a 75kg car as it travels at 25m/s? VariablesFormulaP&CAnswer w/units

39. Gravitational Potential Energy GPE = mghGPE = mgh Mass x gravity x height above the earthMass x gravity x height above the earth

40. A 25Kg statue is dangling from a crane 20m above the ground. How much potential energy does the statue have? How much kinetic energy would it have if it fell? VariablesFormulaP&CAnswer w/units

41. What is the potential energy of the rock? A 59,900 J B 64,600 J C 93,100 J D 121,600 J