PhysicsCode 9702
Energy conservation
What this topic asks you to be able to do
- understand the idea of work, and state and apply the expression work done = force × displacement, with the displacement measured along the line in which the force acts
- recall the principle that energy is conserved, and apply it
- recall and understand that a system's efficiency is the ratio of the useful energy it gives out to the total energy put into it
- apply the idea of efficiency when working through problems
- define power as the amount of work completed in each unit of time
- solve questions by means of P = W/t
- derive P = Fv and employ it when working through problems