Official Answer
Answer
Gudun mannewa shine saurin jujjuyawa wanda ƙarfin centrifugal ke sa zoben riƙewa na waje ya faɗaɗa kuma ya rasa riƙonsa akan gindin tsagi. Idan zoben ya rasa lamba, zai iya girgiza, haifar da lalacewa, ko ma tashi daga ramin. Ƙididdigar madaidaicin saurin izini $N$ shine $N = _x000c_rac{70.4}{D_m} imes ext{sqrt}_x000c_rac{E imes I imes ext{clinging force}}{w imes R^3}$ inda $w$ shine nauyin zoben kowane inch. Don aikace-aikace masu sauri (misali, turbochargers), muna tsara zoben 'Kulle Kai'. Waɗannan suna da ɗan ƙaramin shafin da ke kullewa cikin ƙima akan jujjuyawar da ke kusa, yana hana zobe daga faɗaɗa radially koda a saurin da ya wuce 50,000 RPM.
