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1、物理三导答案TheIongerthepropertyismade.Three,suspectedcases:Springdynamometerinuse,shouldpayattentiontowhat?Answer:Springdynamometerisinusetoclear:tomakethepointeratthezeroline1beforemeasuring,namelyzero.Theclearspringdynamometerrangeanddivisionvalue・Themeasurement,tom
2、akethedirectionwiththeelongationofthespringforceinthedirectionofthesameline・Four,guidetrainingstandards:1.intheuseofspringclynamometerforce,toobserveitsrange(i.e.maximummeasurementrange)andindexvalue,butalsothepointerisinthezeroline,tocheckthepointerandspringissh
3、ellstuck,sothatitcanbefreelytelescopic;inspringdynamometerforceontherangeoverXuisnotallowedit.Theforceof2.INisabout(D)3.atestabout6N,shouldchoosethemostappropriatespringdynamometeris(A)4.staticspringdynamometerbyintheoppositedirection,thesizeis4NtwoFlandF2,thenth
4、enumberofspringergometeris4N.Three,suspectedcases:Answer:shotisaffectedbygravityandresistance,andtheforceoftheobjectisearthandair・Four,guidetrainingstandards:Thecorrectunderstandingof1・g二9.8N/kgis(C)Anobjectwith2.heavy490Nmaybe(B)3.whenastudentinaphysicsexperimen
5、tgroupexplorestherelationshipbetweenthegravityofobjectsandthemassofobjects,theexperimentaldataarerecordedasfollows:ObjectundertestObjectmassm(kg)GravityG(N)RatioG/m(N/kg)ThemeanvalueoftheratioG/m(N/kg)Object1ZeropointoneZeropointninenineNinepointnineNinepointeigh
6、tObject2ZeropointtwoOnepointninesixNinepointeightObject3ZeropointthreeTwopointnineoneNinepointseven(1)intheexperimentalprocess,needtousemeasuringtoolstomeasureobjectspringdynamometerbygravity;(2)fillouttheaveragevalueoftheratioG/mintheblankspace;(3)analyzingtheex
7、perimentaldatainthetable,itisconcludedthatthegravityoftheobjectisproportionaltothemass,andtheratioisfixed,approximatelyequalto9.8N/kg・Page20Three,suspectedcases:Howdoyoucalculateyourweight?Four,guidetrainingstandards:1.whatarethephysicalknowledgereflectedinthethr
8、eediagramsshowninFigure1?(writeatleasttwopoints)(a)applelanding(b)ripraplanding(c),lowflowFigure1(1)objectsneartheeartharesubjectedtogravity;(2)thedirectionofg
