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Understanding Energy Conversions: From Potential to Kinetic

Energy is the ability to do work, and it exists in various forms such as gravitational potential energy (PE), elastic potential energy, and chemical potential energy. Gravitational PE is related to an object's height above a reference point, while elastic PE is associated with the stretching or compressing of materials. In this activity, we explore the dynamics of energy transitions, demonstrating kinetic energy as an object falls and gains speed. Practice graphing the energy in a rubber band right before it hits the floor as it transitions through different states.

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Understanding Energy Conversions: From Potential to Kinetic

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  1. Graphing Energy Conversions

  2. All Energy is the ability to do work – we just have different clues to keep track of! • Gravitational PE • Height above ground • Elastic PE • Stretching or Compression • Chemical PE • Food (not yet eaten) • Gasoline (not yet burned) • Battery (not yet used)

  3. Gravitational PE Any time an object has height above a reference point. Can have Kinetic Energy at the same time.

  4. Let’s look at it in action! PE & KE

  5. Before it drops, 6 meters high

  6. Dropping, at 5 meters

  7. Dropping, at 3 meters

  8. Dropping, at 1 meter

  9. Right before it hits the ground

  10. Practice: Graph the Energy in the Rubber Band at these 3 points in time • Lamar stretches a rubber band and points it at Ms. Nicholson. • He lets go and it launches through the air. • His aim is bad and it misses Ms. Nicholson and falls on the floor. (Graph the energy RIGHT BEFORE it hits the floor!)

  11. Lamar stretches a rubber band and points it at Ms. Nicholson.

  12. He lets go and it launches through the air.

  13. His aim is bad and it misses Ms. Nicholson and falls on the floor. (Graph the energy RIGHT BEFORE it hits the floor!)

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