最新八年级下册物理知识点梳理优秀名师资料.docx

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。