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Transcript
ENERGY Energy is the ability to do work. Work is the force on an object, pushing it over a distance. Force is a push or pull. ************************************************************* Two Forms of Energy – Potential and Kinetic 1. Kinetic energy - is the energy of motion The faster an object moves, the more kinetic energy it has. Examples: a bouncing ball, a book falling, a roller coaster going down the hill 2. Potential energy - energy that is stored in an object Examples: holding a ball before you drop it, a book on the edge of a table, a roller coaster at the top *As potential energy decreases, kinetic energy increases. The Six Types of Energy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1. _Mechanical Energy_- energy associated with moving objects Examples: Bicycle, scissors, grandfather clock, etc 2.___heat/thermal energy____ - energy associated with internal motion of atoms. (It is shaking of molecules.) Examples: caused by friction, the heat you feel from a space heater, etc. It is usually released by any other type of energy. 3._chemical energy__ - energy used to bond atoms together – when bonds are absorbed or released. Examples: any compound (water, baking soda, rust, etc) 4._electrical energy__ - energy of moving electric charges Examples: charge/electrons moving through wires, electric cords, etc. 5. __nuclear energy_ - energy stored in the nucleus of an atom Examples: nuclear fusion or fission, the sun and other stars, nuclear bomb, nuclear power plant 6.__radiant energy___ - energy associated with electromagnetic waves Examples: radio and TV waves, microwaves, light, UV rays, Infrared rays, gamma rays, etc. (Note: Ocean, sound, earthquake, sonar, and ultrasonic waves are not radiant energy. These waves are mechanical because they involve moving objects and need a medium through which to travel.)
