The CGS system had two units of energy, the erg that was related to mechanics and the calorie that was related to thermal energy; so only one of them (the erg) could bear a coherent relationship to the base units.
Sistemul CGS avea două unități de energie, ergul, care era legat de mecanică, și caloria, care era legată de energia termică; deci, numai una dintre ele (ergul) putea avea o relație coerentă cu unitățile de bază.