Official Answer
Answer
Igiti gifunitse ni igishushanyo mbonera aho bore iganisha kuri ruhago ifunze gato cyangwa ikagaragaza ibiruhuko rimwe na rimwe. Ibi bituma impeta ya spiral ishobora guhagarikwa byoroshye mugihe igenda munsi ya bore. Ku mpeta y'imbere, impeta igomba 'gukomeretsa' kugeza kuri diameter ntoya kuruta bore. Igishushanyo mbonera kigabanya guterana $ F_f = \ mu \ cdot F_n $ hagati yimpeta nurukuta rwa bore, bikabuza impeta gushushanya hejuru yicyubahiro cya silindiri hydraulic mugihe cyo kwishyiriraho.
