2018年高考全国二卷全国卷物理试题(卷)及答案解析-精选.pdf

12018864814~1819~2163014.ABCD15.50g252msA10NB102NC103ND104N1620182500mJ0318+0253T=5.19ms11226.6710Nm/kgTA93510kg/mB123510kg/mC153510kg/mD183510kg/m17()300nm1.2810-19J6.6310-34Js3.00108ms-1A11014HzB81014HzC21015HzD81015Hz18l,32lit219v-tt2At1Bt1CD20()L1L2L1L2L1abL2B0ab013B012BAL1b0712BBL1a0112BCL2b0112BDL2a0712B21abcdMacNbdqq0abW1cdW2AabBMN122WWCcdL2WqLDW1=W2aMbN317422~3233~38226100A,900R10~999.9R20~99999.91mA3V1mA3V1R1R2*ab211____________.____________RR239a4fbm/kg0.050.100.150.200.25f/N2.152.362.554f2.93414f=__________N2cf-m3fmMgf=__________f-mk=____________;4g=9.80m/2sf-m____________22412ABBB4.5mA2.0mAB32.010kg31.510kg0.102g10m/s.1B2A525.20ylBExMNyMyMNy12M3xMN64522233[3-3]1515______122435130ABCDE210ababhaHabmSp0T0bg734[3-4]1515340m/s4900m/s1.00s_______m_______210BCDACEABFEGACBCGDCGiDii814A15C16C17B18D19BD20AC21BD22612100291023912.7523M+mg40.4024121BmBaBBBBmgmaBBvBs2=2BBBvas3.0m/sBv2AmAaAAAAmgmaAAvAs2=2AAAvasAAvAAAABBmvmvmv94.3m/sAv25201a2Mv0tavbv1qE=maqmv1=at0lvt1cosvvR2coslR3MNt10cot6vv2243qElmBl2()2622ttT02ElvBl2mvqvBR10T???331aT1p1bT2abV1V2V1=SHV2=SH+hb2mTqB3(1)18BlltEl0101ppTT10pSpSmg1001mgTTpS1212VVTT20011hmgTTHpS1134BCni1r1BCACi2=r2i2r2ACAB33sinsinniri3r3ABi2=r2=60r1=i3=30FDr1i1+180i2r2+r3i3=60ACAB23sinsinsinninCniC0WpSmgh11sinsininr12sin1nCn2323n