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kinetic energy
This term is a technical compound noun used primarily in physics and engineering to describe the energy of motion. It is distinct from potential energy, which refers to stored energy based on position or state. In a scientific context, it is treated as a measurable quantity calculated by the mass and velocity of an object.
Because it describes a physical property or a state of being, it is used as an uncountable noun. You would refer to "a large amount of kinetic energy" rather than "many kinetic energies," unless referring to multiple distinct types or theoretical models of energy in a highly specialized academic paper.
Meanings
Examples
The falling boulder had immense kinetic energy.
The detective analyzed the kinetic energy of the impact.
The turbine converts kinetic energy into electricity.
The turbine converts kinetic energy into electricity.
Ancient catapults relied on stored and kinetic energy.