A.
\(\omega =\)\(\frac{mR^2}{J}\)\(\centerdot\)(\(\frac{\upsilon\ }{R})\),顺时针
B.
\(\omega =\)\(\frac{mR^2}{J}\)\(\centerdot\)(\(\frac{\upsilon\ }{R})\),逆时针
C.
\(\omega =\)\(\frac{mR^2}{J+MR^2}\)\(\centerdot\)(\(\frac{\upsilon\ }{R})\),顺时针
D.
\(\omega =\)\(\frac{mR^2}{J+MR^2}\)\(\centerdot\)(\(\frac{\upsilon\ }{R})\),逆时针