解:(1) N T2( 2 m29 m19 m1g-f=mia ara T2-f=m f=uN=um2g -m2g=0 Tr-tor=Ja 解得:a= m1g-um2g m,+,tU 2 2 r 1g(m2+um2+J/r 2 n1+m02+J/r T m2g(mi+umi+uJ/ra) m71+m2+ 2 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