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Energy is a scalar quantity, and the mechanical energy of a system is the sum of the potential energy (which is measured by the position of the parts of the system) and the kinetic energy (which is also called the energy of motion): [1] [2]
Émilie du Châtelet (1706–1749) was the first to publish the relation for kinetic energy , derived from the experimental observation of objects dropped into clay.. (Portrait by Maurice Quentin de L