1 / 17

Energy

Energy. Energy. Energy is the ability to do work Comes in many forms Measured in joules (J) Objects can gain energy when work is being done to them Kicking a football Lifting an object. Forms of Energy. Mechanical – The energy associated with motion Walking or riding a bike

nitesh
Télécharger la présentation

Energy

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Energy

  2. Energy • Energy is the ability to do work • Comes in many forms • Measured in joules (J) • Objects can gain energy when work is being done to them • Kicking a football • Lifting an object

  3. Forms of Energy • Mechanical – The energy associated with motion • Walking or riding a bike • Water in a waterfall • A car or a plane

  4. Forms of Energy • Electromagnetic – moving electric charges • Electricity • Light

  5. Forms of Energy • Nuclear – energy from the nucleus of an atom • Nucleus is split - Fission • Nuclei join - Fusion

  6. Forms of Energy • Chemical – Breaking or making chemical bonds • Burning rocket fuel • Digesting food • Playing a sport

  7. Forms of Energy • Heat – The internal motion of atoms • The faster particles move, the more heat energy is produced • Rubbing hands together – the friction converts mechanical energy to heat • Phase changes – like melting

  8. Energy • Does a ball have energy? • Does it have energy when it falls? • Can energy be created in the ball? • The ball had energy before it was dropped – potential energy • The ball had energy as it was dropped – kinetic energy

  9. Kinetic Energy

  10. Potential Energy • Potential Energy – the energy of position – stored energy • Stretched rubber band • The string on a bow before an archer shoots an arrow • An object before it is dropped • Undigested food

  11. Potential Energy

  12. Conservation of Energy • The law of conservation of energy states that energy can be neither created nor destroyed • Does this sound familiar? • One form of energy can be converted into another - Newtons_Cradle_-_Incredible_Science.avi • Why is this important?

  13. Conservation of Energy • Because we like roller coasters! • In order for a roller coaster to work, energy must be conserved

  14. Conservation of Energy

  15. Ticket Out the Door • At which point is kinetic energy the highest?

  16. Ticket Out the Door • At which point is potential energy the highest?

  17. Conservation of Energy • Design a Roller Coaster

More Related