Topics that weren't covered on paper 1 and could be on paper 2...
Quarks & leptons, particle zoo, mesons, Feynman diagrams, Strangeness
Charge, voltage, component characteristics
Moments, stability, free fall, motion graphs, SUVAT, vehicle safety, work, energy, power, efffciency
All of optics
Particle stuff bound to come up as there was usually another question for particles in the previous papers (before new spec)