1 8 3 24 1.C2.B3.A4.B5.B6.A7.D8.C 4 4 16 4 2 0 9.BD10.BC11.AD12.AD 6 60 13(1)3.6m/s2 1.8m/s2(2)2 1410.42 1.62 33.02 1.51.31.7 2 15.(8)1A F=3N2AB mv=mv1+Mv2 1=3m/s2=2m/s A 3m/sB 2m/s 1 2 8 16.8 1 x =0.1m T=0.2s v=0.5m/s2 O B C 2n=0,1,2,3 t=5.15+0.2ns n=0,1,2,3 1 2 8 117 123 3 2 1 3181(2)2ydl11 2 1
