Energy extracted by braking. Can be regarded as brake wear - a pair of standard bicycle disc brake pads will last around 50 MJ, for cars around 5 GJ.
Energia extreta per frenada. Es pot considerar com un desgast dels frens: un parell de pastilles de fre de disc estàndard duraran uns 50 MJ, per a cotxes d'uns 5 GJ.