Potential Energy Lesson

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Potential Energy Lesson

  1. 1. November 1 <ul><li>Remember: Make up CFU and HW log. Opportunity for movie on Thursday. </li></ul><ul><li>Objective: </li></ul><ul><ul><li>There is a link between work and energy </li></ul></ul><ul><ul><li>Potential energy is stored energy </li></ul></ul><ul><li>A-Team: </li></ul><ul><li>Homework: Chemical Potential Energy Wksht </li></ul><ul><li>Catalyst: Is work being done as your fill out your DWO? </li></ul>
  2. 2. Five minutes flies by… <ul><li>(Have you checked out the online extras?) </li></ul><ul><li>(EC: Box of Tissues still available) </li></ul><ul><li>(EC Project due Nov 13) </li></ul><ul><li>(Unit Test Nov 21) </li></ul>
  3. 3. Catalyst <ul><li>Q: Is work being done as your fill out your DWO? </li></ul><ul><li>A: Yes. There is a force being applied in the same direction as the distance. </li></ul>
  4. 4. Work and Energy <ul><li>On the blue sheet, write a sentence using work </li></ul><ul><li>On the green sheet, write a sentence using energy </li></ul><ul><li>One per table </li></ul>
  5. 5. Energy <ul><li>Energy is the ability to do work </li></ul><ul><li>The unit of energy is joules (J) </li></ul><ul><li>When you do work on an object, you transfer energy to that object. </li></ul><ul><li>Whenever work is done, energy is transformed or transferred to another system. </li></ul><ul><li>Because energy is a measure of the ability to do work, energy and work are expressed in the same units. </li></ul>What: Why:
  6. 6. Energy <ul><li>Energy can be found in many forms </li></ul><ul><ul><li>Potential </li></ul></ul><ul><ul><li>Kinetic </li></ul></ul><ul><ul><li>Mechanical </li></ul></ul>
  7. 7. Potential Energy <ul><li>Potential energy is energy due to position, shape or condition </li></ul><ul><li>Potential energy is stored energy </li></ul>
  8. 8. Gravitational Potential Energy <ul><li>Results from the force of gravity </li></ul><ul><li>Formula </li></ul><ul><ul><li>PE grav = mass x free fall acceleration x height </li></ul></ul><ul><ul><li>PE grav = mgh </li></ul></ul><ul><ul><li>Units: </li></ul></ul><ul><ul><ul><li>m = kg </li></ul></ul></ul><ul><ul><ul><li>g = 9.8 m/s 2 </li></ul></ul></ul><ul><ul><ul><li>h = meters </li></ul></ul></ul><ul><li>Think: It’s going to have the potential to fall because of gravity </li></ul>Weight = mg
  9. 9. Gravitational Potential Energy
  10. 10. Elastic Potential Energy <ul><li>Elastic potential energy is the energy stored when something is stretched or compressed </li></ul><ul><li>Think: Rubber band that is stretched will pop back into place </li></ul>
  11. 11. Elastic Potential Energy
  12. 12. Create! <ul><li>Make a flip book that illustrates a ball being dropped from some height, hitting the ground, and bouncing at least once </li></ul><ul><li>Label and Show these: </li></ul><ul><ul><li>Gravitational Potential Energy </li></ul></ul><ul><ul><li>The height </li></ul></ul><ul><ul><li>Elastic Potential </li></ul></ul><ul><ul><li>Compression </li></ul></ul>

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