Physics (OCR A, Combined Science, Foundation) Energy (OCR A, Combined Science, Foundation) Energy (OCR A, Combined Science, Foundation) Lesson Content 0% Complete 0/2 Steps P7.1 Work done (OCR A) P7.2 Power and efficiency (OCR A) Energy (OCR A, Combined Science, Foundation) Previous Lesson Back to Course Next Lesson Previous Lesson Back to Course Next Lesson