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195200310JOURNALOFYANBEINORMALUNIVERSITYVol.19No.5Oct.2003:100921939(2003)0520080202(,037008):,,,.:;;:O31316:A:F=mdvdt(1):F=dpdt=d(mv)dt(2),.,,.??,m,,,,.,,.,,,m0,c,mv:m=m01-v2/c2.,m0,c.mv,,,(1),(2);.,,;,.,,,.,,,,.v,m,dm/dt,u,F=d(mv)/dt,F=mdv/dt(1).1,,,.,:2003209202:(1957),,,.:.,F=mdv/dt,Fd(mv)/dt.,,,(),F=mdv/dt,,m,F,dv/dt,,m,,m;m,,Fd(mv)/dt.,,,,,,,,,,,F=mdvcdt=ddt(mvc).(3),vc,,:F=ddt(mv)=mdvdt+vdmdt(4)m,v,F,,.(4)F,m,;v,F,,(4),(4),,,,.,,,,tm,v,mu,t+tm,v+v.mmF,:(m+m)(v+v)-mv-mu=Ft,mv,t,t0,:ddt(mv)-udmdt=F(5)ummm,dm/dt().F,u=0,(5):ddt(mv)=F.(6)uv,(5):mdvdt=F.,F=0,(5)mdvdt+(v-u)dmdt=0.(7),dm,u().,m,(7)f,f=mdvdt=(u-v)dmdt.(u-v),,(u-v),,=-(u-v),:f=-dmdt(8)1m,,,,t.:u=0,(6),ddt[(m+t)v]=(m+t)g.,t=0,v=0mdvdt+v+tdvdt=(m+t)gdvdt=g-vm+t=g-vm/+tm=K,dvdt=g-vK+t.v=gt+at2,a,v,=-g2K+3t,v=gt-gt22K+3t.:t=0v=0,,v.(84)185:;,,,,,.,,,,,.3,,,,.,,,.,,.[1].EWB[J].,2001,19(6):16217.[2],.[J].,2001,18(4):46253.[3],.ElectronicsWorkbench[M].:,2001.DiscussOnVirtualElectronicTechnologyLaboratorySystemKANGZhan2cheng(DepartmentofPhysics,YanbeiNormalUniversity,DatongShanxi,037000)Abstract:Bycomparingelectronictechnologylaboratorywithtraditionalelectroniccircuitone,thisarticleanalyzestheadvantagesofvirtualelectroniclaboratoryandcommentsonthenecessityandpossibilitytointroduceelectroniclaboratoryintopreviewsystem.Keywords:virtualelectroniclaboratory;electroniccircuitexperiment;imitation;laboratorypreviewsystem(81)v=ds/dt,dsdt=gt-gt22K+3t=23gt+2Kg9-4K2g27(2K/3+t)s=13gt2+29Kgt-427K2gln(23K+t).[1].[M].:,2001.[2],.[M].:,2002.[3].[M].:,1984.TheUsingofNewtonsLawofMotionSolvingMassChangingWUBei(DepartmentofMathematicsDatongVocationalCollege,DatongShanxi,037008)Abstract:Thethesistalksabouttheusingtermsofnewtonslawofmotionintowoaspectsofclassicmechanicsandrelativityme2chanics.AndthetermsguidesouttheformulaofNewtonslawofmotionsolvingmasschanging,also,makeexamplestoexplainthathowtousetheformulaofmasschangingtosolverealproblems.Keywords:NewtonsLowofmotion;Thetheoryofrelativity;Momentum482003