The forces or properties that stimulate growth, development, or change within a system. In physics, it refers to the branch of mechanics dealing with the motion of bodies under the action of forces.
From Greek 'dynamikos' meaning 'powerful', derived from 'dynamis' meaning 'power' or 'force'. The term entered English in the 1750s through scientific discourse, initially used in physics before expanding to describe any system of interacting forces.
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