01Space, time and motion10 questionsA.3 Work, energy and power10 questionsStartChoose a focusWork done1 questionEnergy transfers1 questionPower and work1 questionKinetic-energy calculations1 questionVariable-force work1 questionEfficiency1 questionMechanical-energy investigations1 questionElastic energy1 questionUseful power1 questionEvaluating energy arguments1 question