Official Answer
Answer
Kwishyiriraho imbaraga $ S_i $ kumpeta izenguruka ibarwa nka $ S_i = _x000c_rac {E imes t imes ext {kwaguka}} {D ^ 2} $. Nyamara, urukuta rwa radiyo $ w $ (ubugari bwinsinga) rugena imbaraga zisabwa kwaguka (hanze) cyangwa amasezerano (imbere) impeta. Urukuta runini rwa radiyo $ w $ rwongera umwanya wimpeta ya inertia $ I = _x000c_rac {t w ^ 3} {12} $, bigatuma bigorana gushiraho no kongera ibyago byo guhinduka burundu niba kwaguka kurenze ibikoresho bya elastique. Ba injeniyeri bagomba guhitamo $ w $ kugirango barebe 'kwizirika' bihagije kuri shaft badakoze impeta ikomeye kuburyo idashobora gushyirwaho hejuru yumutwe.
