A-Level Physics OCR A H556

3.3.3: Power

#3.3.3a

power; the unit watt; P=WtP = \dfrac{W}{t}

#3.3.3b

P=FvP = Fv

Learners will also be expected to derive this equation from first principles.

#3.3.3c

efficiency of a mechanical system;

efficiency=useful output energy transfertotal input energy×100%\text{efficiency} = \dfrac{\text{useful output energy transfer}}{\text{total input energy}} ×100\%

3.3.2
Kinetic and potential energies
3.4.1
Springs
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