Energy & Power

2. Energy & Power

3. Energy • Ability to do work. • Potential Energy is any form of stored energy. • Gravity • Springs • Kinetic Energy is energy in motion. • Falling Apple • Moving Vehicle

4. Energy • There are 3 different categories of Energy. • Exhaustible / Non-renewable • Renewable • Inexhaustible

5. Exhaustible / Non-Renewable • Examples of Nonrenewable Energy: • Petroleum Based Fuels • Nuclear Energy

6. Renewable • Renewable Energy is sometimes called Bio-conversion. • Examples of Renewable Energy: • Human Energy • Wood • Alcohol / Methanol / Bio-diesel • Trash?

7. Inexhaustible Energy • Examples of Inexhaustible Energy: • Wind • Hydro / Wave • Solar • Geo-Thermal • Cold Water?

8. Thermal Chemical Mechanical Radiant Electrical Nuclear Manufacturing Batteries / Food Motion Solar Heat Movement of electrons Fission / Fusion 6 Forms of Energy & Their Uses

9. Conservation of Energy • Law of Conservation of Energy - Energy cannot be created nor destroyed, however it can be converted from one form to another. • Second Law of Thermodynamics - No energy system can be a 100% efficient.

10. Energy Measurements • Joule • BTU • Calorie

11. Work • Work is the application of force that moves an object a certain distance. • Work can be calculated through the following equation: Work = Force Applied x Distance

12. Power • Power is the amount of work being done over a period of time. • It is a measure of how quickly work is/can be done. • Energy is useful ONLY when it is converted into power. Power = Force x Rate

13. 3 Components of Power • Control • Transmission • Storage

14. Control of Power • To use power effectively, we must be able to control it. • Controlling power enables one to start, stop, or change direction.

15. Energy Transmission • Movement of energy within or into another energy system.

16. Mechanical Advantage • Mechanical Advantage is an increase in force provided by a machine.

17. Simple Machines • Lever • Pulley • Gear • Incline Plane • Wheel and Axle

18. Fluid Power • Hydraulics Systems are those that control and transmit energy through liquids. • Pneumatic Systems are those that control and transmit energy through gases.

19. Newton’s Laws of Motion • Newton's First Law: A body of mass in a state of rest tends to remain at rest and a body or mass in motion tends to remain in motion, unless acted upon by another force.

20. Newton’s Laws of Motion • Newton's Second Law: An unbalance of force on a body tends to produce an acceleration in the direction of the force.

21. Newton’s Laws of Motion • Newton's Third Law: For every acting force there is an equal and opposite reacting force.

22. 4 Energy Systems • Mechanical • Fluid • Electrical • Thermal

23. Mechanical Transmission Gears / Cams Brake Rotors Fluid Engine Coolant Lubricating Brake Fluid Fuel Pump Electrical Starting Lights Spark Plugs Fuel Pump Climate Control Thermal Engine Cooling Climate Control How an Automobile uses Energy