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Potential and Kinetic Energy

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Potential and Kinetic Energy

  1. 1. Energy <ul><li>Types of Energy </li></ul><ul><ul><li>Potential energy </li></ul></ul><ul><ul><li>Kinetic energy </li></ul></ul><ul><li>The ability to do work </li></ul><ul><li>Shown by: </li></ul><ul><ul><li>Application of force </li></ul></ul><ul><ul><li>Movement of something by that force. </li></ul></ul>
  2. 2. Force <ul><li>Push or pull </li></ul><ul><li>More acceleration = _____ force </li></ul><ul><li>More mass = _____ force </li></ul>F = ma more more Force = mass X acceleration
  3. 3. Energy <ul><li>Work = force x distance </li></ul><ul><li>( W = F x d) </li></ul><ul><li>Measured in Joules: </li></ul><ul><ul><li>N (unit of force) combined with with M (unit of distance). </li></ul></ul>
  4. 4. Potential Energy <ul><li>Stored energy: </li></ul><ul><ul><li>Energy that can be burned ____ </li></ul></ul><ul><ul><li>Chemical energy stored in _______ </li></ul></ul><ul><ul><li>Energy stored in food as ______ </li></ul></ul><ul><ul><li>Energy from height above the earth’s surface ________________ </li></ul></ul>fuel a battery sugars gravitational energy
  5. 5. Gravitational Energy <ul><li>Due to the attractive gravitational force between all objects in the universe </li></ul><ul><li>Near Earth’s surface the force due to gravity is 9.8 m/s/s </li></ul>
  6. 6. Gravitational Energy <ul><li>W = F x d </li></ul><ul><li>gPE = mgh </li></ul><ul><li>m = mass of the object </li></ul><ul><li>g = gravitational force </li></ul><ul><li>9.8 m/s/s </li></ul><ul><li>h = height above the surface of the earth </li></ul>
  7. 7. Kinetic Energy <ul><li>Energy due to motion depends on: </li></ul><ul><ul><li>_____ of the object </li></ul></ul><ul><ul><li>______ of the object </li></ul></ul>mass speed <ul><li>More connected to speed than mass: </li></ul><ul><li>KE = ½ mv 2 </li></ul><ul><ul><li>m = mass </li></ul></ul><ul><ul><li>v = speed </li></ul></ul>
  8. 8. Conservation of Energy <ul><li>Energy can’t be created or destroyed </li></ul><ul><li>Can change from one form to another </li></ul><ul><li>Examples: </li></ul><ul><ul><li>Fuel burning makes ____ </li></ul></ul><ul><ul><li>Battery makes ____ </li></ul></ul><ul><ul><li>Use gravity to make </li></ul></ul><ul><ul><li>______ </li></ul></ul>heat light motion

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