Answer
Yin jita-jita yana faruwa ne lokacin da aka sanya zoben riƙewa da lodi wanda ke sa gefen tsagi ya lalace ta hanyar filastik. Yayin da bangon tsagi ya haihu, yana samar da ramp ko 'radius', kuma zoben ya fara murɗawa ko 'tasa' a ƙarƙashin lokacin $M = P \ lokuta (hannun lever)$. Kwancen tasa $\phi$ yayi daidai da nauyin da aka yi amfani da shi kuma ya yi daidai da taurin zoben. Da zarar kusurwar tasa ta wuce ƙima mai mahimmanci (yawanci digiri 10-15), zoben ba zai iya ƙara kasancewa cikin tsagi ba kuma zai gaza ta hanyar 'skewa' ko fitarwa. Don rage wannan, radius na kusurwar da ke ƙasan tsagi dole ne a kiyaye shi zuwa mafi ƙanƙanta (yawanci $< 0.1 \ times d$), kuma 'abutment' ko bangaren mating ya kamata ya sami kusurwa mai kaifi don rage girman hannun lever na nauyin turawa.
