1. Ch. 4
Types of Energy

2. Energy
Energy: the ability to do work

3. Work Work: when a force moves an object to a new location
Force and movement must be in the same direction

5. Equation for Work Work = Force x Distance W= F x D
How much work happens when you push a box with a force of 3Newtons for 5 meters?
W= 3N x 5m
W=15 Joules

6. How much work happens when you push a book with a force of 2 Newtons for 7 meters?
W= 2N x 7m
W= 14 Joules

7. Law of Conservation of Energy
Energy cannot be created or destroyed. Energy can be transferred or transformed into other types of energy.

9. Kinetic
Energy that is being used
In motion

10. Potential Energy Energy that is not being used, but could be.
Stored energy

12. Mechanical Energy
Energy used to do work
kinetic

13. Thermal Energy “heat energy”
The energy that makes atoms and molecules move and vibrate
kinetic

14. Electrical Energy
Energy of a particle moving through a wire
kinetic

15. Magnetic Energy
Energy causing a push or a pull
kinetic

16. Chemical Energy
Energy that is released when atoms and molecules react with each other
Stored in food and fuel
potential

17. Elastic Energy
Energy stored in objects that are stretched
potential

18. Nuclear Energy
Energy stored in the nucleus
potential

19. Gravitational energy
Energy stored in an object when it is above the earth’s surface
Potential

20. Thermal Energy And Sensation of Heat
Why does your hand feel cold when you hold an ice cube?
Why does your hand feel warm when you hold a cup of hot chocolate?

21. Thermal energy flows from the warmer object to the cooler object
You feel the transfer of thermal energy.

22. 3 ways Thermal Energy Moves
Conduction
Convection
Radiation

23. Conduction
Transfer of thermal energy through atoms and molecules bumping into each other

24. Convection
Transfer of thermal energy by means of circulating liquids and gases

25. Convection
Color Dye Convection

26. convection

27. Radiation Transfer of heat and light through electromagnetic waves
Infrared rays: the invisible waves of energy that are radiated by an object

28. Types of Energy Transfer