沪粤版八年级下册物理知识点总结

1.2.:___,.3N4,,.,G=mg5g=9.8N/19.8N6..:,,,7,..8F1L1=F2L21221LLFF910FGMABCDEHILJKABCDEFGHIJKLM11222,,5,511213141516171218.tSVVm/sS,mt,S191.4m/s5km/h4.2m/s15km/h20.21.2223,,24220000N0.02400N25F2627.PPa28SFPPPaFNS1cm2=10-4m229.301Pa=1N/1Pa11N31,,.,,,.32(1)(2)(3)331233435P=ghF=PS3620N20cm21m230N10cm1F1NP1Pa2F2NP2Pag10N/kg1P1=gh=1.0103kg/m310N/kg0.1m=1000PaF1=P1S=1000Pa2010-4m2=2N2F2=G+G=20N+30N=50N37383911.013105Pa760mm10.34m40,,41421234310.34m4445F4647F=G=gV48F=F-F496N1dm36N50,,,,,5152FGFGF=GFG()FG()F=G(=)F=G()53541F=G-F2F=F-F3F=G4F=G=gV555657.,,.58.10-10m5960613.01010l.y.1.0105l.y.8.99109km7.7105km1.28104km6210-7m10-10m10-10m10-14m10-15m10-17m63.646566677.9km/s7.9km/s11.2km/s11.2km/s11.2km/s16.7km/s16.7km/s686970l.y.1l.y.=9.46051012km=9.46051015mG=mgF1L1=F2L2tSVSFPP=gh1F=G-F2F=F-F3F=G4F=G=gV