W = \Delta E = F \cdot d

Types of energy

Gravitational Potential Energy

GPE = mgh

Kinetic Energy

K_{E} = \frac{1}{2}mv^2

Conservation of Energy

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Energy cannot be created or destroyed, but only changed from one from into another

Energy transfer

Sankey diagram

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Transferred to the surroundings as heat and sound.

\frac{(2a+199d)d}{2}=\frac{(2a+99d)d}{2}