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Understanding Work, Energy, Power and Efficiency Physics form Work 1. Work is defined as the product of the applied force and the displacement of an object in the direction of the applied force. 2 . W = F x S 3. W= work done, F = force applied, S = displacement in the direction of force. 4. SI unit for work = Joule (J), other unit = Nm 5. Work is not done when: a. The object is stationary a.k.a not moving b. No force is appliedn the object in the direction of displacement. c. The direction of motion of the object is perpendicular to that of the applied force. 6. When work is done to an object, energy is transferred to the object. Energy (Energy is the capacity to do work) 1. Energy exists in different forms: kinetic energy , gravitational potential energy , elastic potential energy , sound energy , heat energy , light energy , electrical energy and chemical energy. 2. The unit for energy is Joule (J) – same as work 3. The work...