SC 7.3

• The Principle of Conservation of Energy

  1. The principle of conservation of energy states that
  2. Energy cannot be created or destroyed
  3. Energy can be transformed from one form to another
  4. The sum of all energy is always the same
• Transformation between potential energy and kinetic energy

  • In everyday life, transformation of potential energy to kinetic energy of an object happens when the object falls down or is tossed upwards
  • When an object falls from a higher position, the speed increases
  • When an object falling, GPE is decreasing but KE is increasing
  • The decreasing in potential energy equals to the increase in kinetic energy
  • Changes in the gravitational potential energy is the same as that in kinetic energy
  • GPE = KE