解：(1) f中 T2 m2 m m2g T. (mig -T,=ma a=ra T2-f=ma f=N=μm2g (N-m2g=0 Tr-Tar=Ja 解得： mig-um2g a=mi+ma+J/r2 刃、 mgm2+um2+J/r2） m1+m2+J/r2 m2g(mitumi+uJ/r2 mi+m2+/r2 结束目录 f =m N =m m2g m1g T1 = m1a T2 f = m2a a =ra + = r 2 m1g (m2 m m2+ J ) r 2 m1+m2 + J T1 + = r 2 m2g (m1 m m1+ J ) r 2 m1+m2 + J T2 m N g f T2 m2 m2 T2 T1 a m1g T1 m1 N m2g =0 T1r T2 r = J a r 2 + + a = m1g m m2g m1 m2 J 解得： 解：(1) 结束 目录