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《Addition and resolution of forces》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、Additionandresolutionofforces1Whichofthefollowingschoolbagswouldyoufeelheaviertocarryifthesamenumberofbooksareputinthem?AB2Alightropeisstretchedtightlybetweentwopoles.WhatisthetensionTinthestring?AT<4NBT=4NCT>4NAT-shirtofweight8Nishungatthemidpointoftherope.8NForceisav
2、ectorquantity.Ithasbothmagnitudeanddirection.aGraphicalmethodAddingforcesLikedisplacements,forcescanalsobeaddedgraphicallyusingthe'tip-to-tail'method.Linesrepresentingforcesshouldbedrawntoscale.aGraphicalmethodAddingforcesF2F1F2+F1F2F1'Tip-to-tail'methodresultantforcea
3、GraphicalmethodAddingforcesF2F1F2+F1ParallelogramofforcesmethodresultantforceparallelparallelaGraphicalmethodAddingforcesVideoSimulationStretcharubberbandwithaspringbalance.AFOBF1F2Stretchtherubberbandbythesameamountusing2springbalances.AdditionofforcesNotethemagnitude
4、&directionoftheF1&F2.Checkifresultant=F(inmagnitude&direction)by–using'tip-to-tail'method–usingparallelogramofforcesmethodAdditionofforcesVideobAlgebraicmethod(1-dimension)1AddingforcesF2F1=F1F2+FF2F1=F1F2+FAddingforcesinthesamedirection&alongthesameline.Themagnitudeof
5、theresultantforceisthealgebraicsumoftheforces.directionisthesameastheforcesAddingforcesintheoppositedirection&alongthesameline.directionisthesameasthelargerforcecAlgebraicmethod(2-demensions)1AddingforcesForcesin2dimensionscanalsobeaddedalgebraically.Seethisexample:Use
6、1cmtorepresent25000NLengthofAC=6.9cmResultant=173000N(withan?of30?toeitherforce)=6.9?25000N100000N100000NresultantCExample8oilrigABD60?=5Ntan?=34?=36.9?R?=36.9?3N4N5NExample92forces,3Nand4N,actatrightanglestoeachother.Findthemagnitude&directionoftheresultantforce.Resul
7、tantforceis5Nwith36.9?tothe4-Nforce.IfJaniceispushingwithaforceof60N&MaximumforceMinimumforceA100N80NB120N60NC140N20ND160N40NQ1IfJaniceispushingwith...whatarethemaximumandtheminimummagnitudesoftheircombinedforce?Tommyispushingwith80N,Findtheresultantoftheforcesbelowwit
8、hgraphicalmethod.Theresultantforceis________Nmakinganangle__________withthe3-Nforce.Q2Findtheresultantofthe...8.943?3
