This simulation teaches power as the rate of energy transfer / work done.
- In the mechanical (lifting) example, two motors lift the same mass through the same height, so the work done is the same (W = mgh). The only difference is time, so pupils can see that the motor that lifts the load faster has the greater power (P = W/t).
- In the electrical example, pupils see power as energy transferred per second (P = E/t) and also as current × voltage (P = IV), linking the two ways of calculating power.
This approach matches the AQA GCSE Physics specification’s recommended emphasis that students understand power as how quickly energy is transferred (or how quickly work is done) and can apply (P = E/t) and (P = W/t) (and, for circuits, (P = IV).