Define power as work done per unit time and also as energy transferred per unit time; recall and use the equations (a) power = work done / time taken, P = W/t (b) power = energy transferred / time taken, P = ΔE/t

Recall and use the equation work done = force × distance moved in the direction of the force, W = Fd

Describe how energy is transferred between stores during events and processes, including examples of transfer by forces (mechanical work done), electrical currents (electrical work done), heating, and by electromagnetic, sound and other waves