A roller coaster takes energy to make the first rise, but then it should be able to run the course of the track without any input of energy. This, however, is not true. Energy continues to be needed. This is because some of the energy is converted to sound energy, and some is given off as heat energy. This is a good example of which law?
the first law of thermodynamics
the second law of thermodynamics
the third law of thermodynamics
the zeroth law of thermodynamics
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