Kinetic And Potential Energy Notes

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Kinetic And Potential Energy Notes

  1. 1. Kinetic and Potential Energy
  2. 2. Kinetic Energy <ul><li>Energy of MOTION </li></ul><ul><li>If an object is moving it has KE </li></ul><ul><li>Measured using the formula: </li></ul><ul><ul><li>KE = mass * velocity 2 </li></ul></ul><ul><ul><ul><ul><ul><li>2 </li></ul></ul></ul></ul></ul><ul><li>Examples : </li></ul><ul><ul><li>Ball Rolling </li></ul></ul><ul><ul><li>Car Driving </li></ul></ul>
  3. 3. Potential Energy <ul><li>Potential Energy is the Energy of POSITION or SHAPE </li></ul><ul><li>Form of Stored Energy </li></ul><ul><li>Examples : </li></ul><ul><ul><li>Stretched bow or rubber band </li></ul></ul><ul><ul><li>Roller Coaster at top of hill </li></ul></ul><ul><ul><li>Gunpowder and food </li></ul></ul>
  4. 4. Gravitational Potential Energy <ul><li>A specific type of PE </li></ul><ul><li>Created when you do work on an object by using a force that opposes gravity (lifting) </li></ul><ul><li>Measured using the formula: </li></ul><ul><ul><li>GPE = weight (N) * height (m) </li></ul></ul><ul><li>Examples: </li></ul><ul><ul><li>Diver on board </li></ul></ul><ul><ul><li>Car at top hill </li></ul></ul><ul><ul><li>Book on shelf </li></ul></ul>
  5. 5. Mechanical Energy <ul><li>Total energy of Motion and position of an object. </li></ul><ul><li>Measured using the formula: </li></ul><ul><ul><li>ME = KE + PE </li></ul></ul><ul><li>ME always remains for a given object </li></ul><ul><li>Example: </li></ul><ul><ul><li>Simple Online Pendulum </li></ul></ul>
  6. 6. ME stays the same for bus as it goes down the hill ME = KE + PE The bus at this position on the hill has a very high potential energy and little to know Kinetic Energy PE = weight * height KE = (mass * velocity 2 )/ 2
  7. 7. As the bus travels down the hill its PE decreases and its Kinetic Energy is increasing! PE = weight * height KE = (mass * velocity 2 )/ 2 ME stays the same for bus as it goes down the hill ME = KE + PE
  8. 8. At the bottom of the hill the bus has very low PE but very high KE PE = weight * height KE = (mass * velocity 2 )/ 2 ME stays the same for bus as it goes down the hill ME = KE + PE

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