ch 9 sec 1 what is energy n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Ch.9, Sec.1 – What Is Energy? PowerPoint Presentation
Download Presentation
Ch.9, Sec.1 – What Is Energy?

Loading in 2 Seconds...

play fullscreen
1 / 9

Ch.9, Sec.1 – What Is Energy? - PowerPoint PPT Presentation


  • 96 Views
  • Uploaded on

Energy and Work: Working Together. energy : the capacity to do work. Ch.9, Sec.1 – What Is Energy?. work is done when a force causes an object to move in the direction of the force. when one object does work on another, energy is transferred from the 1st object to the 2nd.

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 'Ch.9, Sec.1 – What Is Energy?' - cleopatra-tocci


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
ch 9 sec 1 what is energy

Energy and Work: Working Together

  • energy: the capacity to do work

Ch.9, Sec.1 – What Is Energy?

  • work is done when a force causes an object to move in the direction of the force
  • when one object does work on another, energy is transferred from the 1st object to the 2nd
  • therefore, work is a transfer of energy!
  • energy is expressed in units of Joules (J)

- all matter has atoms; therefore, all matter has energy!!!!!

ch 9 sec 1 what is energy1
Ch.9, Sec.1 – What Is Energy?
  • Kinetic Energy
  • kinetic energy: the energy of motion
  • all moving objects have kinetic energy & this energy can be used to do work
  • kinetic energy can be found using the following formula:

KE = mv²

2

- m stands for mass in kilograms, v stands for the objects speed (the more speed & mass of an object means greater kinetic energy)

  • speed has a greater effect on kinetic energy than mass (faster cars cause greater crashes)
ch 9 sec 1 what is energy2
Ch.9, Sec.1 – What Is Energy?
  • Potential Energy
  • potential energy: the energy that an object has because of the position, shape, or condition of the object
  • any object elevated from the ground has gravitational potential energy (the more weight & height means greater GPE)

- gravitational potential energy can be found using the following formula:

GPE = weight x height

  • GPE is expressed using Newton-meters
  • height of GPE is a measure of how far an object has to fall
ch 9 sec 1 what is energy3
Ch.9, Sec.1 – What Is Energy?
  • Mechanical Energy
  • mechanical energy: the total energy of motion and position of an object (can be all potential, all kinetic, or some of each)
  • mechanical energy can be found using the following formula:

ME = PE + KE

  • mechanical energy remains the same unless it transfers some of its energy to another object
  • even if mechanical energy stays the same, potential or kinetic energy can increase or decrease
ch 9 sec 1 what is energy4
Ch.9, Sec.1 – What Is Energy?
  • Other Forms of Energy
  • thermal energy: all of the kinetic energy due to random motion of the particles that make up an object
  • there’s more kinetic energy in gases than solids because of the molecular movement
ch 9 sec 1 what is energy5
Ch.9, Sec.1 – What Is Energy?
  • chemical energy: the energy of a compound that changes as its atoms are rearranged

- chemical energy is a form of potential energy because it depends on the position & arrangement of the atoms in the compound

ch 9 sec 1 what is energy6
Ch.9, Sec.1 – What Is Energy?
  • electrical energy: the energy of moving electrons

- changing positions of magnets at power plants provides electrical energy (potential energy too)

ch 9 sec 1 what is energy7
Ch.9, Sec.1 – What Is Energy?
  • sound energy: the energy caused by an object’s vibrations (potential energy turned into kinetic energy)
  • light energy: energy produced by the vibrations of electrically charged particles
  • light energy can travel through a vacuum! (an area with little or no atoms, like deep space)
ch 9 sec 1 what is energy8
Ch.9, Sec.1 – What Is Energy?
  • nuclear energy: the energy that comes from changes in the nucleus of an atom
  • energy can be from fusion where atoms can join together to create electrical energy (Sun)

- energy can be from fission where atoms can be split apart in the nucleus to create a lot of potential energy (uranium in the atomic bombs)