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Principle of the Conservation of Energy
Energy cannot be created or destroyed, the total amount of energy before and after a transfer is always equal.
Joules
The unit for energy, with one being the energy needed to raise 1N weight through vertical height 1m.
Work Done
The energy transferred when an object is moved by a force.
Kinetic Energy
The energy of an object due to its motion.
Potential Energy
The energy on an object due to its position.
Power
The rate of transfer of energy.
Useful Energy
Energy transferred for a specific purpose.
Efficiency
A measure of how much of the energy transferred to a machine is useful.
