1. Energy What is energy?

3.  Energy is the ability to do work or cause change.

4. What is energy?  Energy is the ability to do work or cause change.  Work = Force * distance

5. What is energy?  Energy is the ability to do work or cause change.  Work = Force * distance  Force = Mass * Acceleration

6. What is energy?  Energy is the ability to do work or cause change.  The total amount of energy in the universe doesn’t change and has always been here.

7. What is energy?  Energy is the ability to do work or cause change.  The total amount of energy in the universe doesn’t change and has always been here. –1 st Law of Thermodynamics

8. What forms does energy come in?

9.  Kinetic energy:

10. What forms does energy come in?  Kinetic energy: The energy an object has due to its motion.

11. What forms does energy come in?  Kinetic energy: The energy an object has due to its motion. –The kinetic energy of an object is due to both its mass and velocity.

12. What forms does energy come in?  Kinetic energy: The energy an object has due to its motion. –The kinetic energy of an object is due to both its mass and velocity. –Kinetic energy = ½ X mass X velocity

13. What forms does energy come in? –Potential energy:

14. What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.

15. What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy:

16. What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy: Potential energy related to an object’s height.

17. What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy: Potential energy related to an object’s height. –Gravitational potential energy = weight X height

18. Question?  Who has more gravitational potential energy? –Skier A has a mass of 50 kg and a height of 5m. –Skier B has a mass of 60 kg and a height of 4m.

19. Question?  Who has more gravitational potential energy? –Skier A has a mass of 50 kg and a height of 5m. GPE = 50X5 = 250 J –Skier B has a mass of 60 kg and a height of 4m. GPE = 60X4 = 240 J

20. What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy: Potential energy related to an object’s height. –Gravitational potential energy = weight X height  Elastic potential energy: The potential energy of objects that can be stretched or compressed.

21. What are some types of energy?

23.  Electromagnetic  Thermal  Sound  Mechanical  Electrical  Nuclear  Chemical

24. What are some types of energy?  Electromagnetic: Energy that is caused by the acceleration of charged particles.

25. What are some types of energy?  Electromagnetic: Energy that is caused by the acceleration of charged particles.  Thermal: The total of all potential and kinetic energy of a particle.

26. What are some types of energy?

27.  Electromagnetic: Energy that is caused by the acceleration of charged particles.  Thermal: The total of the potential and kinetic energy of the particles in an object.  Sound: The energy produced by an object’s vibration.

28. What are some types of energy?  Mechanical: The form of energy that is associated with the position and motion of an object.

29. What are some types of energy?

30.  Mechanical: The form of energy that is associated with the position and motion of an object.  Electrical: The energy of electrical charges and can be potential or kinetic.

31. What are some types of energy?

32.  Nuclear: A type of potential energy that is stored in the nucleus of an atom.

33. What are some types of energy?  Nuclear: A type of potential energy that is stored in the nucleus of an atom. –Nuclear fission: The splitting of nucleus.

35. What are some types of energy?  Nuclear: A type of potential energy that is stored in the nucleus of an atom. –Nuclear fission: The splitting of nucleus. –Nuclear fusion: The fusing of two separate nuclei into one nucleus.

37. What are some types of energy?  Nuclear: A type of potential energy that is stored in the nucleus of an atom. –Nuclear fission: The splitting of nucleus. –Nuclear fusion: The fusing of two separate nuclei into one nucleus.  Chemical: Potential energy that is stored in the chemical bonds that hold chemical compounds together.

38. Can energy change from one type to another?

39.  ABSOLUTELY