What is the principle of moments? – BBC Bitesize GCSE Physics

Everything PIVOTS on whether our contestants can work out the principle of moments in time – otherwise, their chance of winning an amazing prize will be sleeping with the fishes! Steady up! Keeping them level-headed as always is the well-positioned Dr Rula and our teetering-towards-another-TV-channel-deal host of Extreme Physics, Isaac Neutron! And remember... if it ain't fun, it ain't physics!