1. Energy Vocabulary
Unit 2.1
Advanced Version

2. Introduction to Energy

3. Energy
The ability to do work or cause change. (Work – the movement of an object through a distance).

4. What is energy really?

5. The Law of Conservation of Energy
In physics, the law of conservation of energy states that the energy can not be created or destroyed, only transformed.

6. Law of Conservation of Energy (Roller Coaster Demo)

7. Kinetic Energy
Energy resulting from the motion of an object. The amount of kinetic energy an object has is determined by the mass and speed (velocity) of the object.

8. Potential Energy
This is stored energy. An object has potential energy because of its position or composition.
Ex: A bike on top of a hill.

9. Energy Transformation
Energy can be transformed
(changed) from one form to another.
EX: Flipping a switch to turn on a light.

10. Energy Transformation Examples

11. Mechanical Energy The energy associated with the motion of an object.
EX: Tossing a ball in the air.

12. Elastic Potential Energy
Stored as a result of deformation of an elastic object, such as the stretching of a spring.

13. Gravitational Potential Energy
Energy an object possesses because of its position in a gravitational field.

14. Friction
A force that opposes the motion of an object. Friction is present when two objects are in contact with one another.

15. Joule
The standard unit of work or energy in the International System of measurements (SI), equal to the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force: equivalent to 10 7 ergs and one watt-second.
EX: One joule is equal to the work it takes to make a watt of power for a second. In physics, it's common to talk about joules of energy — one example used to illustrate a joule is lifting an apple, which weighs about one Newton.

16. Discovery Of Energy ~ James Prescott Joule & William Thomson