The World Around Us Is Full of Energy What is Energy? The ability to do work.

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Presentation transcript:

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 = F x d 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. PE grav = 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 e.cfm e.cfm

Physics: Wile E Coyote and Roadrunner Style ure=related ure=related

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