Physics (OCR A, Single Science, Foundation) Energy (OCR A, Single Science, Foundation) Energy (OCR A, Single 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, Single Science, Foundation) Previous Lesson Back to Course Next Lesson Previous Lesson Back to Course Next Lesson