Energy Kim Lachler 2010 NCES 6.P.1 Heat Light Sound

What is Energy? the ability to work

So what is work? when a force causes an object to move in the direction of the force. Work = force X distance Energy is transferred from the first object to the second object, so that it can do work.

How is energy measured? Energy is measured in Joules (J) (1 J = amount of energy it takes to lift an object that weighs pounds {1 Newton} 1 meter) that weighs pounds {1 Newton} 1 meter)

Three main types of energy Kinetic Energy energy in motion energy in motion Kinetic energy = mv 2 2 m = mass v = velocity m = mass v = velocity

Three main types of energy Potential energy Potential energy energy an object has because of its position Gravitational potential energy – the force of gravity working on an object Gravitational potential energy = weight x height Elastic potential energy – energy stored in a stretched rubber band

Three main types of energy Mechanical energy total energy of motion and position of an object total energy of motion and position of an object Mechanical energy = potential energy + kinetic energy The mechanical energy remains the same. As potential energy increases the kinetic energy decrease. As potential energy increases the kinetic energy decrease. Or as the potential energy decreases the kinetic energy increases Or as the potential energy decreases the kinetic energy increases

6 other forms of energy Thermal energy kinetic energy due to random motion of particles that make up an object kinetic energy due to random motion of particles that make up an object

6 other forms of energy Chemical energy potential energy based on the arrangement of atoms potential energy based on the arrangement of atoms

6 other forms of energy Electrical energy potential energy based on moving electrons being ready to be used potential energy based on moving electrons being ready to be used

6 other forms of energy Sound energy potential energy changing to kinetic energy through vibrations potential energy changing to kinetic energy through vibrations

6 other forms of energy Light energy Similar to sound energy - potential energy changing to kinetic energy through vibrations Similar to sound energy - potential energy changing to kinetic energy through vibrations

6 other forms of energy Nuclear energy Nucleus of atoms contain huge amounts of potential energy

Nasa, electromagnetic spectrum accessed 12/16/ Media College. COM, How Sound Waves Work, waves.html, accessed 12/16/ waves.htmlhttp:// waves.html Cool Cosmos, What is Heat?. accessed 12/16/ KEEP, What is Energy?, accessed 12/17/ Discovery Education, Clip Art Gallery, accessed 12/17/2010 Holt,Rinehart and Winsteon, North Carolina Holt Science & Technology, Holt,Rinehart and Winsteon, New York, 2005 Discovery Education, accessed 12/28/2010