Taldayt tajummant n kra ntfekka tagennawt neɣ n tfekka niden dtaẓukt s usrag n yiger aldayan adigan n tfekka ɣef tjumma n tfekka-nni ya.
Taldayt tajummanttettwaket s usemres numiter deg tsint tamkuẓt igan d tigget nusizzel deginagraw agreɣlan n tiggtin. Akken i tezmer ad tili tenfalit ɣef teldayt tajummant itfekkiwin s usemres nteldayt tameslugent tanamurt am akken d amnir i wserwes d wakat yegdan T = 9.80665 m/s2[1]
Degtsengallunt, tezmer ad tili tenfalit ɣef teldayt tajummant am tmektitT (log g) i d-ittilin s tenfalit d wakat n teldayt tajummant degAnagraw n CGS, anda tigget n usizzel tga d cm/s⁴, sin akin tuddma nulugaritmasuzmir 10.[2]S usenned ɣef d akken taldayt tessemday ɣef kra yellan s tugdut, war tamuɣli ɣdr takura-ines degwegram dukiligram