Work, in the context of physics, is defined as the energy transferred to or from an object by applying a force over a certain distance. Quantitatively, it is calculated as the dot product of the force vector and the displacement vector. When the force applied is constant and acting in the direction of motion, the work done is the magnitude of the force multiplied by the displacement. The SI unit for work is the joule (J), which is equivalent to a newton-meter (N⋅m). Since work represents the rate of energy transfer, it is fundamentally related to the change in the mechanical energy of a system, encompassing concepts such as work done against gravity or work done by tension.