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

2. What is Energy? the ability to work

3. 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.

4. How is energy measured? Energy is measured in Joules (J) (1 J = amount of energy it takes to lift an object that weighs 0.445 pounds {1 Newton} 1 meter) that weighs 0.445 pounds {1 Newton} 1 meter)

5. 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

6. 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

7. 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

8. 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

9. 6 other forms of energy Chemical energy potential energy based on the arrangement of atoms potential energy based on the arrangement of atoms

10. 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

11. 6 other forms of energy Sound energy potential energy changing to kinetic energy through vibrations potential energy changing to kinetic energy through vibrations

12. 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

13. 6 other forms of energy Nuclear energy Nucleus of atoms contain huge amounts of potential energy

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