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Conservation of Energy

Ngā Whāinga Ako


Types of Energy

Recall from last class the different types of energy:

  1. Active
  2. Potential

PotentialActive
ChemicalKinetic
GravitationalHeat
ElasticRadiant
NuclearElectric
MagneticSound

For each of the following pictures, write down what the picture is showing you and the type of energy associated with it.



NB: Not a real photo







Law of Conservation of Energy

If you can remember it, write it down in your book without looking, otherwise go to the next kiriata!


Energy cannot be created or destroyed, only transferred or transformed from one type to another.



The Pendulum


Another good tauria of the conservation of energy is in hydroelectric power generation. Watch this video to find out about one portion of New Zealand’s hydroelectric scheme.


Hydroelectric Power Generation


What Is Energy?



Perpetual Motion?

You may have heard of perpetual motion machines - machines that create infinite energy!


These machines appear to run forever, producing energy forever without consuming any energy.

Unfortunately, they are always a scam! People have been trying to make them since the dark ages but can all be shown to not work due to the law of conservation of energy!