Answer
'Spiraling out' jechuun haala kufaatii yoo ta'u, babal'inni seentiriifuugal ring'n sun qabannaa isaa jala groove irratti akka dhabu taasisa. Erga gingilchaan kana booda hin taa’in booda, qarri fuulduraa gingilchaa amala manaa tokko irratti qabachuu ykn raafamadhaan baafamuu danda’a. Saffisni murteessaan $\omega_c$ dha. Yoo saffisa hojii $\omega_{op} > \omega_c$ ta'e, gingilchaan ni bal'ata. Rakkoo furuuf, 'Diyaameetirii Bilisaa' $D_s$ kan gingilchaa kufe ilaali; yoo spec jalqabaa caalaa guddaa ta'e yeroo dhaabuu garmalee dhiibbaa irra ga'eera ykn humna seentirifuugaliin babal'ateera. Sirreeffamni isaas 'Self-Locking' ring ykn meeshaa reeshiyoo $E/\rho$ ol'aanaa qabu fayyadamuudha.