Link to our latest notes and resources: https://drive.google.com/drive/u/2/folders/15FiTDXvqn9Dro7UmuRhn4fVtonBgy6TM 5 Work, energy and power An understanding of the forms of energy and energy transfers from Cambridge IGCSE/O Level Physics or equivalent is assumed. 5.1 Energy conservation Candidates should be able to: 1 understand the concept of work, and recall and use work done = force × displacement in the direction of the force 2 recall and apply the principle of conservation of energy 3 recall and understand that the efficiency of a system is the ratio of useful energy output from the system to the total energy input 4 use the concept of efficiency to solve problems 5 define power as work done per unit time 6 solve problems using P = W/t 7 derive P = Fv and use it to solve problems 5.2 Gravitational potential energy and kinetic energy Candidates should be able to: 1 derive, using W = Fs, the formula ∆EP = mg∆h for gravitational potential energy changes in a uniform gravitatio

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