技工学校天津职业技术师范大学单独招生考试

整理文档很辛苦,赏杯茶钱您下走!

免费阅读已结束,点击下载阅读编辑剩下 ...

阅读已结束,您可以下载文档离线阅读编辑

资源描述

11p=mv42pppAB1m=40gv=1m/sv=0.5m/ssmkgsmkgmvp/04.0/104.0smkgsmkgvmp/02.0/)5.0(04.0ppp=smkgsmkg/06.0/04.002.0p2I=FttI=Ft56AB2mHgHgHt2sin1sin22mgmgcosmgsingHmIgHmIgHmING2,tan2,sin2mHppp2721I=ptPFmatmvmvF12tpF5F6IFtmv2mv1WFs21mv2221mv211v0mtp=Ft=mgt2432mt1t2FIABCt1+t2t2mg(t1+t2)-Ft2=0221tttmgFt1t2mgt1-I=0I=mgt1t1t2Fmg3Mmav0amMv0/g000,vMggamMvvmMvMgvamM7m=1kgh1=0.45mh2=0.2mt=0.6sg=10m/s2Ft1=0.3st2=0.2st3=0.1smgt-Ft3=0F=60NABCmMv0v/28v13122112211vmvmvmvm,23122112211vmvmvmvmp1+p2=p1/+p2/2p1+p2=0p1=-p24561..2.34m1Av1m2BBABABABvABABAB21vv1AB121121212112,vmmmvvmmmmv23ABAB121121vmmmvv21212122121122121mmvmmvmmvmEk1Mmv190HvvmMmv1mgHvmMmv2212121gmMMvH22112vmMmv25kgm/s6kgm/sABABA2kgm/sABABvAvB,BAmm65ABBAmm83BABAmmmm2823262522227483BAmm293111mv0MdvmMmv0fs1s2s1-s2=d22012121mvmvsf2221Mvsf2022022121vmMMmvmMmvdffdQdfdmMMmvf220s2dmMms2dmMmsmmMvvsdvvvvvvsds2020022,,2/2/mMs2d202vmMMmEkEK=fddEK22mMLLl1l2mv1=Mv2tml1=Ml2l1+l2=LLmMml2m1v1=m2v2(m1+m2)v0=m1v1+m2v2s2ds1v030323310m/s300g50m/s200gG=(m1+m2)gsmv/100m1=0.3kg501vm/sm2=0.2kg2v2211021)(vmvmvmm502.0503.010)2.03.0()(2110212mvmvmmvm/s20050m/s44ABMLmABABABvVMV=mvVvVvMd=mL-Lcos-dd=mL1-cos/M+m55MBmAmM,ABABv0,ABAB1AB21ABMv0-mv0=M+mvv=mMmMv02As,v,Mv0-mv0=Mv-mgs=21mv2-21mv02s=mgmM22v026ABkgmA5.0kgmB3.0kgmC1.0CsmvC/25ABBC3.0m/s1AAv2CACvABCCABABC1CAABCBABAAvCBBsmvB/0.3BCBAACCvmmvmvm)(ABCBCCAmvmmvmv)(=smsm/6.2/5.00.3)1.03.0(251.02CvBCCBACBCACvBAAvBCBCCBBvmmvmvm)(CABBCBCmvmvmmv)(smsm/2.4/1.06.23.00.3)1.03.0(3111.m2mABAFBEFABBDA.FB.FAC.FAED.FAE/3[AAAAABEp=mE4ABE/3]2.LdmRBd___________[RvLBmg22vEPtQEPEQQ=2mgd]31.0kgm15m/sABABm1=0.2ABs=2.25mm12.5kgm2m20.6m4m/sg10m/s2m1m1ABB4/m2m2m22/m11/ABB0.254ACDBBLODA=0.1Ah=2CD=1(1)L=2AB?A(2)BOLABA(1)20AC(2)L0.76AD9.55m0.4kg20m/sM1.6kg0.2.(1)(2)(3).[(1)0.5m/s2(2)4m/s(3)8s]mMmMFABLddB3226,M,R.mV0.:V0?)1(2RvmmgVOu).(uv)2()(0uvmMumv)3(2)(2121212220mgRuvmMumvMRgmMv)45(0vRv/2uVu7AkgmA2smv/14q=0.2CB,kgmB1.0,,,,B=0.5T,B,.(1)B.(2)A.(3)[:,B,,AB,,,.B,,A,.(1)mgqBv1smqBgmvB/101(2):smvMvmvMv/5.13221(3)JmvMvMvQ75.8212121212228,,,,.M,2,P,U,m,e,,123[1)1(2212eUqUmvEkmeUv/22N)2(2NeUENPkN=P/2eU3VMVtmvNMVmv0eUmMPa/90.01kg300m/s6cm0.2cm12VvMmmv)(0LL+d2202121)(mvmvdLf221MvfLV=10m/SM=0.29Kg10()mAmBCAAv2vBCABCAABCABCAAgvt1BACvAABC3vvgvt322A3vvmgdfdQgvdvmvmmvmgd37,3321221212222AABVABCv2v331112345F=-kxF=-kx67kmT2mkF=-kxk112kmT23kmT24O0x00mgkxx0()FmgkxxFkx1mk1A2FmF-mg=mamg-F=ma1kA=mgA=kmg2Fm-mg=mgFm=2mg2OBCBC20cmB0.5sC1f1Hz25s10cm3BO4cmP523TDAtt+ttT/2Dtt+ttTCtT2tttDtTttt21;2103;glT2rvmmgT2cosmgsinsintanx/L,FkxxLmgLxmgFk1g,g=224TLl2231656x341212ATtS4720NcmABA05NxBxC04s175D04s035cm08Lt=0gLt23D92kgF5HzOA=1cmOB=4cmOC=9cmFg=10m/s2OA=1cmAB=3cmBC=5cmTOA=TAB=TBC=T/2=0.1s:s=aT2a=22TABBCTs=2m/s2F-mg=maF=mg+ma=24N1=+==212.(),(),A31.,(),,.2.,,(,),4,,51210DABCD11abcdeaABAaBcCcDxtB35yx0yx01121234S50HZ40m/sSt=0.03st=0.03s1.51.5S5fv12312xy12xmym1234ts1234xm4123Svv1.20.80.400.40.81.23621234123fvsvtTvf121t=0t1=0.7sPABt=0t=0Ct2=0.9sQt3=1.26sQ2xv=10m/st1=1.3s;t2=1.5s3xt1=0t2=0.005sT(t2-t1)T(t2-t1)v=6000m/s4AB6m14m5ABAB3m,ABAB37312345A1231234(21)2sn22snn(21)2sn22snn5620Hz20000Hz17mm17m0.1s1ab6mab5Hz10m/sA.B.DA.abB.aba1.5mC.abD.ab245mABOA10mBAA(8)25cm1m/s0.5mCBEBCDACEBAB20cmCCD0.25sB20cmSA38111,20900W0900W09001800W01mFACD[]AFBFCFDF34w=FSCOSw=W=Ek5FF=221FFFSW=Pt2DABCD211121)(atagmsFW2)(21atagm2222mgatsFWag21WWa=g21WWag21WW61237W=Fscos8:3912tWPtP=FvcosFvPFvFPFPcos30.5kg2s2s2sg2/10sm2s20210212122gthmJmghWG10020105.050tWPW2ssmsmgtvt/20/2102s100tmgvPWPG=mgvyP=FvF-f=maP=FvF-f=maPvFaF=fa=0vfPFPvmmmW=PtW=FsFP=FvF-f=maFavPPPmmmmmvfPFPvW=FsW=PtP4mPv1v2v2v1F-f=ma1vPf2vPF212121)()11(vmvvvPvvmPa52000kg80kW20m/s2m/s23sP=FvF=4000Nttv=at=2tP=FvF=8000Nv=2tt=5s3sv=at=6m/sFFf=maF=8000NP=Fv=4.8104WW=Pt=400005J=2105J.vafF40211221mvEk21231221mvEkmp22kmEp2241EpEpmghh1232Ep1wFSmaaVV22122w21222121mvmv21222121mvmvw1m60vv1v2A261mvB241mvC231mvD221mvF221mvFsW211412130cos30cos230cosmvFssFsFWB24122312342v080%v2021mvmgH20218.0mvHfmgH=v02/2gmgf4122021218.02mvmvHf053vv3mhh/1012h/8h1W=WF+WG=EK=0WG=1011mghWF=101Ffh1011mgh101Ffh=0Ff/mg=11112hEKW=WF+WG=EK=09mgh/8Ffh/8=EKEK=mgh/44Mh=0.20mL=1.7mm=0.10Mv0=180m/sv=90m/ss=1.6mv1mv0=mv+Mv1v222212121MvMvMgLghvs22=0.5015PQmPQAHABCABHBvBABQPBhvW221mvmghWHHhsinv=vBcos4HmgmvWB)12(41227mPs0v0L200210cossinmvmgLmgScossin20210mgmvmgSL4231(3),2v3==E=E4512312m3mABOAOBO2LLAOBOAAvBhBvmAABBAB2222321221322vmvmLmgLmg118gLvBOOA2mg2Lcos=3mgL1+sin4cos-3sin=3sin53-=sin37=16BWGOAB223212221vmvm=2mg2Lsin-3mgL1-cos=mgL4sin+3cos-32mgL114gLvm2RBAMmACBAABAARhB242RRHKPEE2)(212vmMmgRRMgEPmMmgRRMgvc23ABRCAABABCCACRvmmg2BC2221212BmvmvRmggRvB5CA2212gtRs=vtgRvs=2RAB22Bvasga45BOv1/2ABOv1OABBOA434JW=EkWG=-EPW=EW56fd=Qd1mFHACA.mgHB.FHC.FHD.2ABCDBCDABCACBCDAD3abcabcABCDbcgh2abaABcCabbcD4MmsEmpEK22EmMMmvEEmvE22221121,21mMMssmMMvvss21225MmvLvvMmMmmMMmvQ22M=mMm221vmMQ62kgABv6ms4kgC.BC.1A?2?1ABC.ABCmA+mBvmA+mB+mCvAvA=4226)22(m/s=3m/s2BCBCBCvmBv=mB+mCvv=4262=2m/sAvAEpEp=21mB+mC2v+21mAv2-21mA+mB+mC2Av=212+422+21262-212+2+432=12JabcABCmv44

1 / 19
下载文档,编辑使用

©2015-2020 m.777doc.com 三七文档.

备案号:鲁ICP备2024069028号-1 客服联系 QQ:2149211541

×
保存成功