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kinetic energy Article

Which units of energy are commonly associated with kinetic energy?

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For everyday objects the energy unit in the metre-kilogram-second system is the joule. A 2-kg mass (4.4 pounds on Earth) moving at a speed of one metre per second (slightly more than two miles per hour) has a kinetic energy of one joule. The unit in the centimetre-gram-second system is the erg, 10−7 joule, equivalent to the kinetic energy of a mosquito in flight. The electron volt is used on the atomic and subatomic scales.

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