Explain the Concepts and principles of energy and power. Objective 7.09

Define Energy, Work, Power Energy – The ability to do work. Power – The amount of work done in a given period of time. Work – is the application of force that moves an object a certain distance.

Six Major Forms of Energy Mechanical Energy Radiant Energy Chemical Energy Electrical Energy Thermal Energy Nuclear Energy

Mechanical Energy Is often provided by the motion of a device.

Radiant Energy Is the energy emitted by electromagnetic devices.

Chemical Energy Energy that is stored within a substance or product.

Electrical Energy Energy produced as a result of the movement of electrons through a conductor.

Thermal Energy Is the name given to heat energy. Thermal cannot be seen but is generally felt.

Nuclear Energy Energy associated with the internal bonds of an atom. Fission Fusion

Energy Conversion Process Mechanical Advantage Hydraulics Systems Pneumatic Systems Potential Energy Kinetic Energy

Mechanical Advantage An increase in force provided by a machine.

Hydraulics System Those that control and transmit energy through liquids.

Pneumatic Systems Those that control and transmit energy through gases.

Potential Energy Is any form of stored energy. Kinetic energy is energy in motion

Newton’s Law’s of Motion 1st law – a body of mass in a state of rest tends to remain at rest and a body of mass in motion tends to remain in motion, unless acted upon by another force.

Newton’s Law’s 2nd Law – states that an unbalance or force on a body tends to produce an acceleration in the direction of the force.

Law of Conservation of Energy Energy cannot be created nor destroyed, however it can be converted from one form to another.

Renewable / Nonrenewable Solar Energy Non renewable Petroleum based fuel

2nd Law of Thermodynamics No energy system can be 100% efficient.