Addition and resolution of forces

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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