Transcript Energy
The World Around Us Is Full of Energy What is Energy? The ability to do work Work is … Force exerted upon an object to cause that object to be displaced W=Fxd The Joule is the unit of work. 1 Joule = 1 Newton * 1 meter A force is exerted upon the object to cause that object to be displaced. There Are 2 States of Energy Potential Energy PE Kinetic Energy KE Potential Energy Stored energy as the result of position. Gravitational Elastic Gravitational Potential Energy Energy stored in an object as the result of its vertical position or height Dependent on two variables - the mass of the ball and the height to which it is raised. PEgrav = mass * g * height Gravitational Potential Energy It is directly proportional to its height above the zero position A doubling of the height will result in a doubling of the gravitational potential energy. What is the Potential Energy? How Did You Do? Elastic Potential Energy Energy stored in elastic materials as the result of their stretching or compressing. There Are 2 States of Energy Potential Energy PE = mgh Kinetic Energy KE Kinetic Energy The energy of motion: Vibrational Rotational Translational (motion from one location to another)* Kinetic Energy Kinetic energy of an object depends on the mass of the object So….. Kinetic energy can be converted into Work! Work: Force exerted upon an object to cause that object to be displaced There Are 2 States of Energy Potential Energy(J) PE = mgh Kinetic Energy (J) KE = ½ mv² Energy Law of Conservation of Energy: Energy can not be created or destroyed All forms of energy can be converted to other forms PE KE W All forms of energy can be converted to other forms: PE KE W mgh = ½ mv² = Fd J=J=J Potential vs. Kinetic Energy http://www.physicsclassroom.com/mmedia/energy/p e.cfm Physics: Wile E Coyote and Roadrunner Style http://www.youtube.com/watch?v=Jnj8mc04r9E&feat ure=related