Physics 122 Final Exam Review - Mult Ch. 1. Which is a vector ...

1. Whichisavectorquantity FinalExamReview-MultCh. Physics122
2. A3.0-newtonforceanda4.0-newtonforceactconcurrentlyonapoint.Inwhichdiagramshownwould a)distance theorientationoftheseforcesproducethegreatestnetforceonthepoint b)time c)mass d)velocity
a) b) c) d)
3. forceisneededtokeeptheblockmovingatconstantspeedwhenitslidesonsurfaceB Inthediagramshown,surfaceAofthewoodenblockhastwicetheareaofsurfaceB.IfittakesF
a)F newtonstokeeptheblockmovingatconstantspeedacrossthetablewhenitslidesonsurfaceA,what b)2F c)12F d)4F
4. a)A representsthedirectionofthefrictionalforce Acartrollsdownaninclinedplanewithconstantspeedasshowninthediagram.Whicharrow b)B c)C d)D
5. Thediagramrepresentsacarrestingonahill.Whichvectorbestrepresentstheweightofthecar a)A b)B c)C d)D
6. initialvelocityis866meterspersecondanditsinitialverticalcomponentis500meterspersecond. Acannonresaprojectileatananglewiththehorizontal.Thehorizontalcomponentoftheprojectile's
Whatistheshapeofthepaththattheprojectilewillfollow [Neglectairresistance.]
7. a)circular b)straight c)hyperbolic d)parabolic
a)549m/s After5.00seconds,whatistheverticalcomponentoftheprojectile'svelocity b)500m/s c)451m/s d)49.0m/s

8. Page2
Themaximumheighttowhichtheprojectileinthepreviousproblemrisesisapproximately
9. Aballisredverticallyupwardat5.0meterspersecondfromacartmovinghorizontallytotheright a)2:50103m at2.0meterspersecond.Whichvectorbestrepresentstheresultantvelocityoftheballwhenred b)1:28104m c)1:54104m d)4:42104m
a) b) c) d)
10.Aprojectileisredwithavelocityof150meterspersecondatanangleof30withthehorizontal. a)75.0m/s Whatisthemagnitudeoftheverticalcomponentofthevelocityatthetimetheprojectileisred
11.Ablockisatrestonaninclinedplaneasshowninthediagram.Asangleisincreased,the componentoftheblock'sweightparalleltotheplane b)130m/s c)150m/s d)225m/s
a)decreases b)increases c)remainsthesame
12.Thediagramhererepresentsaballbeingkickedbyafootandrisingatanangleof30fromthe horizontal.Theballhasaninitialvelocityof5.0meterspersecond.[Neglectfriction.]
a)decreases Astheballrises,theverticalcomponentofitsvelocity
13.Inthediagram,theweightofaboxonaplaneinclinedat30isrepresentedbythevectorW.What isthemagnitudeofthecomponentoftheweight(W)thatactsparalleltotheincline b)increases c)remainsthesame
14.Abirdfeederwithtwobirdshasatotalmassof2.0kilogramsandissupportedbywireasshownin a)W b)0:50W c)0:87W d)1:5W
a)10N thediagram.Theforceinthetopwireisapproximately b)14N c)20N d)39N

Page3 15.Thediagramshowsabaseballbeinghitwithabat.Anglerepresentstheanglebetweenthe
a)25 horizontalandtheball'sinitialdirectionofmotion.Whichvalueofwouldresultintheballtraveling thelongesthorizontaldistance[Neglectairresistance.] b)45 c)60 d)90
16.Thehandleofalawnrollerisheldat45fromthehorizontal.Aforce,F,of28.0newtonsisapplied magnitudeoftheforcemovingtherollerforward a)7.00N tothehandleastherollerispushedacrossalevellawn,asshowninthediagram.Whatisthe b)14.0N c)19.8N d)39.0N
17.Astheanglebetweenaforceandlevelgrounddecreasesfrom60to30,theverticalcomponentof theforce
18.Thediagramshowsapersonexertinga300-newtonforceonthehandleofashovelthatmakesanangle of60withthehorizontalground.Thecomponentofthe300-newtonforcethatactsperpendicularto a)decreases b)increases c)remainsthesame
a)150N thegroundisapproximately b)260N c)300N d)350N
19.Fourdierentballsarethrownhorizontallyothetopoffourclis.Inwhichdiagramdoestheball a) havetheshortesttimeofight b) c) d)
20.A1.0-kilogramblockisplacedoneachoffourfrictionlessplanesinclinedatdierentangles.Onwhich inclinedplanewilltheaccelerationoftheblockbegreatest a) b) c) d)

21.Whatisthemagnitudeofthecentripetalaccelerationofa4-kilogrammassorbitingat10metersper secondwitharadiusof2meters Page4
22.Thegravitationalforcebetweentwoobjectsisinverselyproportionalto a)5m/sec2 b)50m/sec2 c)80m/sec2 d)200m/sec2
23.Astronautsexperienceaconditioncalledweightlessnesswhenboththeyandtheirenvironmenthave a)masssquared thesame b)distancesquared c)mass d)distance
24.ThediagramshowspositionsofasatelliteasitorbitstheEarth.Atwhichpositionwillthesatellite a)momentum achieveitshighestvelocity b)speed c)acceleration d)mass
a)A b)B c)C d)D
25.Astheradiusofanorbitingsatelliteisdecreased,thespeedrequiredtokeepitinorbitwillhaveto
26.Anobjecttravelingwithuniformcircularmotionhasacentripetalaccelerationduetothechangein a)decrease b)increase c)remainthesame
27.SatelliteAhasacircularorbitofradiusRandsatelliteBhasacircularorbitofradius2R.Compared a)speed totheperiodofsatelliteA,theperiodofsatelliteBis b)direction c)kineticenergy d)mass
28.Asoneobjectmovesawayfromanotherobject,thegravitationalforceofattractionbetweenthem a)less b)greater c)thesame
29.Ifthe10-kilogrammassisreplacedwithagreatermass,thecentripetalaccelerationwill a)decreases b)increases c)remainsthesame
30.IfobjectOismovinginauniformcircularmotionaroundpointPatconstantspeed,whichvector a)decrease shownrepresentsacentripetalforce b)increase c)remainthesame
a) b) c) d)

Page5 31.Whatisthecentripetalaccelerationofaballtravelingat6.0meterspersecondinacirclewhose a)0.66m/sec2 radiusis9.0meters
32.IfthedistancebetweenaspaceshipandthecenteroftheEarthisincreasedfromoneEarthradiusto 4Earthradii,thegravitationalforceactingonthespaceshipbecomesapproximately b)1.5m/sec2 c)15m/sec2 d)4.0m/sec2
33.Thediagramshownrepresentsa4:0102-kilogramsatellite,S,inacircularorbitatanaltitudeof a)1 5:6106meters.Theorbitalspeedofthesatelliteis5:7103meterspersecondandtheradiusofthe 16asgreat b)14asgreat c)16timesgreater d)4timesgreater
Earth,Ris6:4106meters.
Thecentripetalaccelerationofthesatelliteisapproximately
34.Ifthealtitudeofthesatelliteinthepreviousproblemdecreased,itscentripetalaccelerationwould
a)9.8m/s2 b)4.9m/s2 c)2.7m/s2 d)1.4m/s2
35.ThediagramshownrepresentsthemotionofaplanetaroundtheSun,S.Thetimeittakestheplanet a)decrease togofrompoint1topoint2isidenticaltothetimeittakestheplanettogofrompoint3topoint4. b)increase c)remainthesame
b)Thecentripetalaccelerationoftheplanetisconstant. a)Thetwoshadedregionsofthediagramhaveequalareas. Whichstatementmustbetrue
36.Twomasses,AandB,moveincircularpathsasshowninthediagram.Thecentripetalacceleration c)Theplanetmovesataconstantspeed. d)TheplanetmovesfasterwhenitisfarthestfromtheSun. ofmassA,comparedtothatofmassB,is a)thesame c)one-halfasgreat b)twiceasgreat d)fourtimesasgreat

37.Amotorcycleofmass100kilogramstravelsaroundaat,circulartrackofradius10meterswitha constantspeedof20meterspersecond.Whatforceisrequiredtokeepthemotorcyclemovingina Page6
a)200N circularpathatthisspeed
38.Themomentumofa5-kilogramobjectmovingat6meterspersecondis b)400N c)2000N d)4000N
39.Thediagramhererepresentsamassof1.0kilogramtravelingat8.0meterspersecondinacircular a)1kgm=sec pathofradius4.0meters. b)5kgm=sec c)11kgm=sec d)30kgm=sec
a)8:0kgm=sec Whatisthemagnitudeoftheobject'smomentum
40.Whichofthefollowingobjectshasthegreatestmomentum b)16kgm=sec c)8.0newtons d)16newtons
41.Inthediagramshown,a10-kilogramballisredwithavelocityof500meterspersecondfroma a)a1-kgobjectmovingat200m/sec c)a20-kgobjectmovingat20m/sec b)a10-kgobjectmovingat30m/sec
1,000-kilogramcannon.Whatistherecoilvelocityofthecannon d)a100-kgobjectmovingat2m/sec
a)5m/sec b)2m/sec c)10m/sec d)500m/sec
42.Thediagramshownrepresentstwoobjectsatrestonafrictionlesshorizontalsurfacewithaspring compressedbetweenthem.Whenthecompressedspringisreleased,thetwoobjectsarepushedapart.
a)1.0m/s ofimpulse Whatisthevelocityofthe2.0-kilogramobjectthatisshownafterbeingactedonby10newton-seconds
43.Ifanetforceof10newtonsactsona6.0-kilogrammassfor8.0seconds,thetotalchangeofmomentum ofthemassis b)2.0m/s c)5.0m/s d)10m/s
a)48kgm=s b)60kgm=s c)80kgm=s d)480kgm=s

Page7 44.Astringrequiresa175Nforceinordertobreakit.A3.5kgmasistiedtothisstringandwhirledin withoutbreakingthestring a)vmax=7:5m=s averticalcirclewitharadiusof0.90m.Whatisthemaxiumumspeedthatthismasscanbewhirled
45.Whatistheminimumvelocityrequiredforarollercoastercarttostayonatrackwhengoingthrough aloopofradius13mThemassofthecartis125kg. b)vmax=7:3m=s c)vmax=6:0m=s d)vmax=12m=s
46.Whatistheaccelerationduetogravityonaplanetthatis4timesasmassiveofEarthandhasa a)11.3m/s radius2.5timesthatofEarth b)1400m/s c)1200m/s d)15.9m/s
47.WhatorbitalradiusabouttheEarthwillresultinanaccelerationof1:96m=s2 a)15:7m=s2 b)6:28m=s2 c)25:1m=s2 d)7:84m=s2
48.Aplanetis7:8MEarth.IfitssurfacegravityisthesameasEarth's,whatistheplanet'sradius a)6:38106m b)3:9109m c)2:01014m d)1:4107m
49.Anobjectisplacedonaatboard.Theboardisslowlyincreaseduntiltheobjectjuststartstomove. a)2:8REarth Iftheanglebetweentheboardandthehorizontalis29whatisthecoecientofstaticfriction b)7:8REarth c)0:13REarth d)0:35REarth
50.Refertothediagrambelowwhichshowsasignhangingfromasupport.Whatisthetensionineach a)0.55 wireThemassis51kgandtheangleis62. b)0.48 c)0.87 d)0.29
a)500N b)280N c)250N d)1000N