动量守恒定律及应用.txt

1 () a b c d 幹 mvm v0(mm)vmv00v.acbd ac 2(2009)mv0 vmv () amv0(mm)vmv bmv0(mm)vm(vv0) cmv0(mm)vm(vv) dmv0mvmv mv0(mm)vmv. a 31m壬 mm () amm bmm cmm dmm mm bc 4(2010) dl.m洬 () a.b. c. d. t m msldmb b 5aba pa9 kgm/sbpb3 kgm/s.abab () apa6 kgm/spb6 kgm/s bpa8 kgm/spb4 kgm/s cpa2 kgm/spb14 kgm/s dpa4 kgm/spb17 kgm/s dek. aekekvavbab vavbvavbbc ekekc a 62ab ab ab () aab bab cab dabab aaa aab abab ffnab cd d 73aa abva ab ab () aa bav cb dab bavavbab d d 84峵 abamabmb mamb ab () a b c d amavmbvmv0v c 9(2010)5am2 kg bv02 m/sa棬ab ab仯6() 5 6 a2 j b4 j ca1 m dab0.1 5ba1 m/s mv0(mm)vm2 kg1 j 2 j1 s1 mb1 m/s20.1.cd cd 10(2009)2009 7 o()ooa ao们cm aclcorg. 7 (1)a (2)oa (3)bo0.8c oab (1)acava mgl0mva2va. (2)oaiimva0va im. (3)absaomgs0.8mg(l rs)0mva2vasl4r. (1)(2)m(3)l4r 118abc飬 ma2.0 kgmbmc1.0 kg ab ab108 j() c4 m/sb (1)(bc)ab (2) (1)赯abvavb mavambvb0 mava2mbvb2ep va6 m/svb12 m/s (2)abc v mcvc(mambmc)v v1 m/s cbbcv mbvbmcvc(mbmc)v v4 m/s epmava2(mb mc)v2(mambmc)v250 j. (1)6 m/s12 m/s(2)50 j 12(2009)9bcl1.0 m av010 m/sbab ccv2.0 m/s.abm cak0.45.(g 10 m/s2) 9 (1)cab (2)abckcab (1)abmambab v1. mav0(mamb)v1 v1v05.0 m/s abcv2 (mamb)v22(mamb)v12(mamb)g l v24.0 m/s. (2)cabv3. (mamb)v2(mamb)v3mcv (mamb)v22(mamb)v32mcv2 v3(4k) m/s k6 k6k6 abc 4k2 k2 k6k2 k4v30