15高中物理力学试题(答案及解析)

12120151v0ABCDv0v0AA2ABCDAA3ABC221ABCABBCACBCDBBCAAABCABBCCBADB..4FABCDB12FFFGB.51m2m1k2kCBA321A11kgmB12kgmC21kgmD22kgmCm2k2m1+m2gk2x12112()kxmmgm2k2m2gk2x2222kxmg1122mgxxxk12mgkC6FF1AFF1BFF1CFF1DFF1AFF1A7FF421ABCDAFNF+N=Gcosf=GsinFNGABCD8FABCDCFC9521ABCDAF1F2F1F2FF1F2FOF1F2BCDAA.10mFv0A.5B.C.D.FCABCsincosmgFDC..F62111MEFAEBFCEEFDFAEFABEFEFCDA12F1F2AF1BF1CF2DF2B1cos2GF1FBA2FCD13ABFFA721AAFBAFCADAAFDABA14ABFAAABBABFCBFDBBD0AABAFBAFABB15MAmBABCMmgDMmgBAABFFABF821DABAABMmgDC16AABACADABcossinmgmgcossintan,tantanAAcossinmgmgDAF)cos(sinFmgmgABAF0)cos(sin)cossin()coscos()sinsin(FmgmgFmgFmg0C17FfFNAfFNBfFNCfFNDfFNCAA921yFN=Gcos+FsinFFNFcos=mgsin+fABDCC.181FaF2g=10m/s2()A2kgB6kgC0.2D0.6BC48,6,F48NF48NF48NF=M+maMm8kgF48NF-mg=ma6kga=0.2BC19OOBA1021A.OAB.OAC.OAD.OADOO.AOBOAD20(N)ABCDCDmgcosABCDCD21F()AOB1121ABCDAA.BFFABC.CD.F,DA22,A,,BCDD2dlFF1F2F1=F2F1=F21221FsinF1F2DD.23.kO(O)mPROP30A32mgBCDmgRkCDGFNN=F=mgACFmgxkk==R+x=R+mgkDBCD24MmF1321A.gmMB.FgmMC.sinFgmMD.sinFgmMCsin()NFFMmgsinNFMmgFCABD25mv0ABmgCDDAmgcosBCmgsin-mgcos=mamgsin+mgcos=maDD..26FFFf()A.B.C.D.DGNv01421FFf,FFfGND.27CA.BFBAB.A.B1B.C2A1=02=0B1=02C102=0D102BABAAB285NOF30FA.5.0NB.2.5NC.8.65ND.4.3NBFFF29AB4.0NA1521A.4.0NB.4.0NC.4.0ND.BABAAAB4.0NB30MmAmgsinBgcosC(m+M)gDDmgcosAmgsingsinBCD31ABAABACBDBB1621AABBCD32MAMBMCMDMAcosmgcosmgABCD33,OA2x0mBx0A02gxB0mgxCgD03mgxD1721Ov2001222mgxmvvgx02gxAxmgmgkxkxB0xx0mgkxBgggCB03mgxD34mMF12A2mgB1mMgC2FMmgDFDm1mgABf1Ff1CDD.35ABCDADC=120AfD1821A2fBf33CfDf3BAAffF33DDff33BACD36mABF1F2,F1F2,vtAAB2:1BF1A3:1CF1F22:1DABBDAvt12AB12ABA1Aa2Aa1:2111AFfma12Afma113FfB.CB1Ba2Ba2:1221BFfma22Bfma223Ff212FFC.Dvt0032vxtDAD.1921vt.37mABk,.2FmgABA.A2gB.ABC.AmgkD.AAA.AFF2gAB.ABABBC.BA2mg/kCD.F=2mgADA.3854m11l12543123()Al2B54C253D253CA112AB531154B2021Cm2322mfmgmg1mfmgf23354CDC..39mRR/2PPA.mgB.2mgC.22mgD.23mgDR/260,f=mgsin6032mgD40mABCDB2121ABCD