energy
Download
Skip this Video
Download Presentation
Energy

Loading in 2 Seconds...

play fullscreen
1 / 12

Energy - PowerPoint PPT Presentation


  • 365 Views
  • Uploaded on

Energy Chapter 9 Section 4 Energy Energy is the ability to do work or cause change What is Transfer of Energy ? When an object or living thing does work on another object, some of its energy is transferred to that second object.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Energy' - ostinmannual


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
energy

Energy

Chapter 9 Section 4

energy2
Energy

Energy is the ability to do work or cause change

What is Transfer of Energy?

When an object or living thing does work on another object, some of its energy is transferred to that second object.

When energy is transferred, the object upon which work is done gains energy.

The SI Unit for both Work & Energy = Joule

slide3
A moving object, such as wind, can do work when it strikes another object and moves it some distance.When a breeze does work lifting leaves, it transfers energy to them.
kinetic energy
Kinetic Energy

What is Kinetic Energy?

Energy an object has due to its motion

Depends on the objects MASS and its SPEED

Kinetic energy increases as mass increases or if its speed increases.

Kinetic Energy = ½ Mass x Speed2

brain break
BRAIN BREAK!

With your partner, create an analogy for Kinetic Energy and how mass and speed are related.

potential energy
Potential Energy
  • Stored energy that results from the position or shape of an object.
  • Object has the potential to do work.
slide7
1) Gravitational Potential Energy

Related to an object’s height.

GPE = Weight x Height

Does a skier have more gravitational potential energy on a 50 meter high jump or a 40 meter high jump?

What is the GPE of a skier that weighs 500 Newtons and is on a 40 meter high ski jump?

slide8
2) Elastic Potential Energy

When an object gains Potential energy because it is stretched or squeezed.

What are some examples?

Archer pulling back on an arrow changes the shape of the bow…the bow now has more potential energy that can be used to send the arrow flying

mechanical energy
Mechanical Energy

An object’s combined kinetic energy and potential energy

Mechanical Energy =

Kinetic Energy + Potential Energy

slide10
For example:

A football weighs 4 Newtons and has a mass of .4 kg

What is the football’s Kinetic Energy if it is moving at a speed of 14 m/s?

Kinetic Energy = ½ Mass x Speed2

39 Joules

What is the football’s Potential Energy if it is 3 meters above the ground?

Potential Energy = Weight x Height

12 Joules

What is the football’s mechanical energy?

transformation between potential kinetic energy
Transformation between Potential & Kinetic Energy
  • An object that rises or falls experiences a change in its kinetic and gravitational potential energy.

Active Art Textbook Link:

http://www.phschool.com/atschool/phsciexp/energy_transformations/index.html

slide12
The Kinetic Energy of the ball thrown into the air becomes gravitational potential energy. Its potential energy becomes kinetic energy as it falls.
ad