最新八年级下册物理知识点梳理优秀名师资料.docx
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最新八年级下册物理知识点梳理优秀名师资料.docx
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最新八年级下册物理知识点梳理优秀名师资料
八年级下册物理知识点梳理
ConstructionschemeofChapter1.1theintegratedpresentationasaprogrammaticdocumentforguidingconstructionoftheconstructionorganizationdesigntomeettherequestoftenderdocumentstoprincipleshighlightthescientificnature,seriousnessandfeasibility,regulatoryandguidance.Accordingtoaboutcontentandthecompanyrelatedengineeringconstructionexperience,onprojectmanagementorganizationinstitutionsset,laborplansarrangements,materialsupplyarrangements,mechanicalequipmentconfiguration,mainpointspartitemsengineeringconstruction,durationguaranteemeasures,andquality,andsecurityguaranteemeasures,guaranteesafety,civilizationconstruction,reducednuisance,reducedpollutionandnoiseofmeasures,dohasdetailedofdeployment,toensuretheengineeringquality,andhigh-speed,andsecuritycivilization,andenvironmentalconstruction.1.1.1theestablishmentbasis1tenderdocument;2Summaryofconstructiondrawinganddrawing,technicalapproval;3geologicalsurveyreport,localweatherconditions;4tothesupplyofmaterials;5construction-relatedlaws,regulationsandlocalregulations,compulsoryprovisionofengineeringconstruction,existingnational,industry,regionalAtlasofnorms,proceduresandstandards;7companyofthequalitymanual,environmental/occupationalsafetyandHealthHandbookandproceduresdocument;8technology,funding,equipmentandconstructionmanagers,laborandtechnicalforcerichconstructionandrelatedengineeringexperiencewithgoodserviceandcommitmenttothecompany.1.1.2.11.1.2preparationofprinciplescommittedtoallmeetalltherequirementsandtenderdocumentsallcommitmentsservice-oriented,focusoncustomersatisfactionasthemainevaluation,qualityfirst,fullyembodiesthedesignstyle.1.1.2.2earnestlyfamiliaritywithdrawingpaperandunderstandthedesignphilosophy,manifeststhedesignintent,playtothecompany'soveralladvantagetoachievehighquality,highspeed,safety,andenvironmentalprotectionconstruction,advancedtechnology,reducingthecostof.1.1.2.3aroundthequalityobjectivesoftheproject,carriedoutinthequalitycontrol"testevaluationofseparation,strengtheninspection,perfectmeans,processcontrol,"the16-characterguidelinetoensurethateligibilitycriteria,onthebasisofstrivingforexcellence.1.1.2.4ensuringconstructionsafetyaccident-free,environmentallyfriendlyproductionandcivilizedconstruction,toachievemunicipal"modelsafeandcivilizedconstructionsite".1.1.2.5promotion,applicationconstructionof10newtechnologiesandnewmaterials,newtechniques,newequipmentandimprovethelevelofprojectandconstructionmanagementofmodernscientificandtechnologicalcontent,declareaprovincialconstructiontechnologiesapplicationanddemonstrationproject.1.1.3preparationof
八年级下册物理知识点梳理
第七章力
第1节力
1、什么是力?
力是,力不能离开存在,其中给出力的物体叫物体,另一个接受力的物体叫物体;
2、力的单位:
物理学中,力用符号表示,力的单位是,简称,符号是3、力的作用效果有两种:
一是力可以使物体的发生改变;二是力可以使物体的发
的改变和改变、生改变。
运动状态的改变包括物体运动快慢
4、力的三要素:
力的、、叫力的三要素。
影响力的作用效果的是力的、、
5、力的示意图:
在受力物体上沿着力的方向画一条线段,在线段的末端画一个箭头,表示物体所受力的和。
这种方法叫做力的示意图。
(会画力的示意图)
6、物体间力的作用是的。
穿溜冰鞋的人用力推墙,人会向退,这是因为力的作用是第2节弹力
1、物体由于而产生的力叫做弹力。
物体受力时会发生形变,不受力时形变能自动恢复到原来的形状的特性叫做;不受力时不能自动恢复到原来形状的特性叫做。
拉力、压力、支持力都是弹力,对吗,答。
2、测力计是测量的大小的工具。
实验室里测量力的工具是,它是根据在弹性限度内,弹簧受到的越大,弹簧的就越长的道理做成的。
测量力的工具还有握力计,臂力计等。
而各种各样的秤是测质量的。
3、使用弹簧测力计时,首先要观察它的和,不许超过它的。
还要观察弹簧的指针是否指到零刻线,若没有,则要调或读数时要进行加减修正。
弹簧在测量范围内有:
伸长与受到的拉力成比,弹簧的伸长=长度-原长。
如原长2厘米,受3N时弹簧长5厘米,受6N的拉力时弹簧长厘米。
4、注意:
、测力时力的方向要与弹簧测力计的轴线方向一致
第3节重力
1、重力:
物体由于而受到的力叫做重力,用字母表示。
重力的施力物体是,方向是。
地面附近的一切物体都受到了力的作用。
2、物体重力的大小跟它的成正比,表达式为,重力与质量的比值为,它的意义是。
粗略计算时,g取N/Kg、重力的大小要随位置而,而质量随位置变。
物体在月球上受到的重力是地球上重力的。
地面上60千克的物体受到的重力为牛顿,拿到月球上去重力为N。
地面上800克的物体受到的重力为牛顿,用量程为5N的弹簧秤能称出它的重力吗?
答。
3、重锤线是利用重力的制成的,用它来检查所砌的墙壁是否。
4、重心是重力在物体上的。
均匀外形规则的物体的重心在这个物体的几何中心上。
会画物体受到的重力的示意图:
5、宇宙间的任何两个物体间都存在的力这就是万有引力。
第八章运动和力
ConstructionschemeofChapter1.1theintegratedpresentationasaprogrammaticdocumentforguidingconstructionoftheconstructionorganizationdesigntomeettherequestoftenderdocumentstoprincipleshighlightthescientificnature,seriousnessandfeasibility,regulatoryandguidance.Accordingtoaboutcontentandthecompanyrelatedengineeringconstructionexperience,onprojectmanagementorganizationinstitutionsset,laborplansarrangements,materialsupplyarrangements,mechanicalequipmentconfiguration,mainpointspartitemsengineeringconstruction,durationguaranteemeasures,andquality,andsecurityguaranteemeasures,guaranteesafety,civilizationconstruction,reducednuisance,reducedpollutionandnoiseofmeasures,dohasdetailedofdeployment,toensuretheengineeringquality,andhigh-speed,andsecuritycivilization,andenvironmentalconstruction.1.1.1theestablishmentbasis1tenderdocument;2Summaryofconstructiondrawinganddrawing,technicalapproval;3geologicalsurveyreport,localweatherconditions;4tothesupplyofmaterials;5construction-relatedlaws,regulationsandlocalregulations,compulsoryprovisionofengineeringconstruction,existingnational,industry,regionalAtlasofnorms,proceduresandstandards;7companyofthequalitymanual,environmental/occupationalsafetyandHealthHandbookandproceduresdocument;8technology,funding,equipmentandconstructionmanagers,laborandtechnicalforcerichconstructionandrelatedengineeringexperiencewithgoodserviceandcommitmenttothecompany.1.1.2.11.1.2preparationofprinciplescommittedtoallmeetalltherequirementsandtenderdocumentsallcommitmentsservice-oriented,focusoncustomersatisfactionasthemainevaluation,qualityfirst,fullyembodiesthedesignstyle.1.1.2.2earnestlyfamiliaritywithdrawingpaperandunderstandthedesignphilosophy,manifeststhedesignintent,playtothecompany'soveralladvantagetoachievehighquality,highspeed,safety,andenvironmentalprotectionconstruction,advancedtechnology,reducingthecostof.1.1.2.3aroundthequalityobjectivesoftheproject,carriedoutinthequalitycontrol"testevaluationofseparation,strengtheninspection,perfectmeans,processcontrol,"the16-characterguidelinetoensurethateligibilitycriteria,onthebasisofstrivingforexcellence.1.1.2.4ensuringconstructionsafetyaccident-free,environmentallyfriendlyproductionandcivilizedconstruction,toachievemunicipal"modelsafeandcivilizedconstructionsite".1.1.2.5promotion,applicationconstructionof10newtechnologiesandnewmaterials,newtechniques,newequipmentandimprovethelevelofprojectandconstructionmanagementofmodernscientificandtechnologicalcontent,declareaprovincialconstructiontechnologiesapplicationanddemonstrationproject.1.1.3preparationof
ConstructionschemeofChapter1.1theintegratedpresentationasaprogrammaticdocumentforguidingconstructionoftheconstructionorganizationdesigntomeettherequestoftenderdocumentstoprincipleshighlightthescientificnature,seriousnessandfeasibility,regulatoryandguidance.Accordingtoaboutcontentandthecompanyrelatedengineeringconstructionexperience,onprojectmanagementorganizationinstitutionsset,laborplansarrangements,materialsupplyarrangements,mechanicalequipmentconfiguration,mainpointspartitemsengineeringconstruction,durationguaranteemeasures,andquality,andsecurityguaranteemeasures,guaranteesafety,civilizationconstruction,reducednuisance,reducedpollutionandnoiseofmeasures,dohasdetailedofdeployment,toensuretheengineeringquality,andhigh-speed,andsecuritycivilization,andenvironmentalconstruction.1.1.1theestablishmentbasis1tenderdocument;2Summaryofconstructiondrawinganddrawing,technicalapproval;3geologicalsurveyreport,localweatherconditions;4tothesupplyofmaterials;5construction-relatedlaws,regulationsandlocalregulations,compulsoryprovisionofengineeringconstruction,existingnational,industry,regionalAtlasofnorms,proceduresandstandards;7companyofthequalitymanual,environmental/occupationalsafetyandHealthHandbookandproceduresdocument;8technology,funding,equipmentandconstructionmanagers,laborandtechnicalforcerichconstructionandrelatedengineeringexperiencewithgoodserviceandcommitmenttothecompany.1.1.2.11.1.2preparationofprinciplescommittedtoallmeetalltherequirementsandtenderdocumentsallcommitmentsservice-oriented,focusoncustomersatisfactionasthemainevaluation,qualityfirst,fullyembodiesthedesignstyle.1.1.2.2earnestlyfamiliaritywithdrawingpaperandunderstandthedesignphilosophy,manifeststhedesignintent,playtothecompany'soveralladvantagetoachievehighquality,highspeed,safety,andenvironmentalprotectionconstruction,advancedtechnology,reducingthecostof.1.1.2.3aroundthequalityobjectivesoftheproject,carriedoutinthequalitycontrol"testevaluationofseparation,strengtheninspection,perfectmeans,processcontrol,"the16-characterguidelinetoensurethateligibilitycriteria,onthebasisofstrivingforexcellence.1.1.2.4ensuringconstructionsafetyaccident-free,environmentallyfriendlyproductionandcivilizedconstruction,toachievemunicipal"modelsafeandcivilizedconstructionsite".1.1.2.5promotion,applicationconstructionof10newtechnologiesandnewmaterials,newtechniques,newequipmentandimprovethelevelofprojectandconstructionmanagementofmodernscientificandtechnologicalcontent,declareaprovincialconstructiontechnologiesapplicationanddemonstrationproject.1.1.3preparationof
第1节牛顿第一定律
1、阻力对物体运动的影响:
运动的小车受的阻力减小,向前滑行的距离变、如果小车运动时不受阻力,小车将运动下去、
2、牛顿第一定律:
一切物体在没有受到力的作用时,总保持状态或状态。
这就是著名的。
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