Conservation of energy

principle · 1847 · Industrial Revolution

Energy is neither created nor destroyed; it changes from one form to another.

Where it is used

• Thermodynamics — is used in. The first law of thermodynamics is the conservation of energy.
• Joule heating — is used in. Joule measured the mechanical equivalent of heat.
• Crumple zone — is used in. The crash energy goes into deformation rather than into the passengers.
• Yo-yo — is used in. Potential → kinetic energy.
• Roller coaster — is used in. Potential energy turns into kinetic energy.

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