Ku- physics, amandla impahla eyisilinganiso okufanele idluliselwe emzimbeni noma ohlelweni lomzimba ukwenza umsebenzi emzimbeni, noma ukuyifudumeza.Amandla ayinani eligciniwe ; umthetho ukongiwa amandla uthi amandla kungenziwa iguqulwe somzimba, kodwa asenziwanga noma ubhujiswe. Iyunithi yokukala ku- International System of Units (SI) yamandla yi- joule, okungamandla adluliselwe entweni ngomsebenzi wokuyihambisa ibanga lemitha elilodwa ngamandla e- newton eyodwa.