... 24s Cõu HD : t = n1 .1, = n2 1, 8 n = 9n t = 12 , 6.n n1 1, 8 = = n2 1, n2 = n tmin = 12 , 6( s) RHai lc lũ xo ging cú lng vt nng 10 (g), cng lũ xo 10 02 N/m dao ng iu hũa dc theo hai ng thng song ... ln lt l 1, 4s v 1, 8s Kộo hai lc v trớ cõn bng mt on nh ri ng thi buụng nh thỡ hai lc s ng thi tr li v trớ ny sau thi gian ngn nht A 8,8s B 12 ,6 s C 6,248s D 24s Cõu HD : t = n1 .1, = n2 1, 8 n ... = nT1 = ( n + 1) T2 = n.2, 002 = ( n + 1) 2, 0 01 = 4006, 002 ( s ) TRUNG TM LUYN THI HNG C THY CHU VN BIấN WEBSITE: http://violet.vn/bienhongduc RHai lc lũ xo cú chu kỡ ln lt l T1, T2...