PhysicsFinalPartA \
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MLJITIPLI CHOICE: For eachof the following choorethe oneBESTanswer.
figarcs in all calculations.
significanf
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1. A lighthasa resistiance
of 5.6 ohms.Howmuchcunentwill passthroughthiswireif it is connected
to a 220V
supply?
a. 25mA
b.39A
c.4035mA
d.12000A
2. Theautomobile
headlightdraws30.ampsfroma 12V battery.Howmucfrpoweris used?
a. 360kwh
b. 360W
c. 33 kW
d. 360td/\,
3. Forthe thirdrighthandruleyou putyourthumbin the directionof tre
of the
andyourpalmpointstowardsthe_.
, yourfingersin the direction
a. magneticfield;force;conventional
cunent
b. conventional
cunent;magneticfield;force
c. force;conventionalcunent;magneticfield
4. Thetwotypesof magnetsare
a. virtualandreal
c. temporaryandpermanent
b. naturalandmanmade
d. lodestones
andneodymium
5. A4Oresistorisconnectedinparallelwitha6OreEistoranda2Oresistor.
Theresistanceofthecircuitisnow
ohms.
a. 1.20
b . 1 .0 9
c.0.92
d.2.51
6. \Alhyis it saferto be in a car whenlightningstrikes?
a. The rubbertiresinsulatethecar ftom beinggrounded.
b. Theglassof the car insulatesthe inside.
c. Thecafs frameattrac'ts
the electronsto the outsideshellof the car.
d. lt's notsafe!Getout!
7. Terminalvelocity
canbe describecl
as
a. the finalvelocitya fallingobjectreaches.
b. the velocitythatwill kill a fallingperson.
c. fte highestvelocitya fallingobjectreaches.
d. the constrant
valuethattellsthe rateat whichan objec'tfalls.
8. MirandaandTaylorarefacingeachoffrerwhilestandingon skabboards.To getthemselvesmovingtheypush
on eachother.Theybothmovebackwardsawayfiom eachother.This is an exampleof _.
a. Newton'sldlawofmotion
b. Nevrrton's2dlawofmotion
c. Newton's3d law of motion
d. the law of conservationof energy
9. \ Jhichof the followingo$ecb is at equilibrium
andhasno netforcesac'tingon it?
: l:::T:::'.:":::i:1
.,^ ^r^1'r^A'.,'^G^^,^-^
c. A fallingobjectthat has reachedterminalvelodty.
d. A boxthat hasjust beenpushedhardenoughto overcomethe staticfiction force.
10.Themoon'Sgravttypullson an ashonautwitha forceof 145.6N. lf the acmlerationdueto fire moon'sgravrty
is 1.6m/s2,whatis the massof the astronaut?
a. 91 kg
b. 91.0kg
c. 2330kg
d. 2.3x 103kg
11.Whatis the momentum
of a 145g baseballtravelingat +40.0m/s?
a. 5.80x 103kg*m/s
b. O.g0kg"m/s
c. 3.60kg"m/s
d. 0.276kg"m/s
12.which of the followingwouldcausean incrcasein apparentweight?
a. Ridingin an elevatormovingupvardsat a constiant
speed.
b. Whenthe bral<es
are appliedat the endof a longdropon a fiee fall ride.
c. As an elevatordowsdownwhilemovingupwards.
d. As a rollercoasteraccelerates
downa hill.
13.Whichstratement
belowis trueaboutthefiollouring
graph?
d(m)
a. The velocityis zero.
t (s)
b. Thevelocityis increasing
in the positivedirection.
c. Thevelocityis increasing
to thewest.
d . The velocig is constantand positive.
14.A sportscar canmove100.0m in the first4.5 s of uniformaccebrationfiom rest. \Mratis the cafs
acceleration?
a. 22mts2
b. 9.8 m/s2
c. 4.9 m/s2
d. 4.5 x 103mls2
15.Whichof thefollowingprorresthathorizontaland
verticalvelocities
are independent
of eacfrother?
a. A rockand a baseballare droppedftom the top of the stadium.Theyhit the concretebelowat the same
time.
b. Youshoota dartat yourlittlebrotherwhois hangingfiom a tree.Rightas youfire,he letsgo, butyour
dartstillhi'hhim.
c. A flat pieceof paperand a balledof pieceof paperare droppedftom the sameheight.The ball of paper
hitsthe groundfirst.
d- Youtry to shoota squinelwitha BB gunbut hefallsout of the treeat the sametimethatyouftre.you
missthe squinelbecausehe is notwherehe waswhenyouaimed.
16' Lighttakes1.28s to travelfromthe moonto the Earth.\A/hatis the distane betl,l,een
them?
a. 3.8 x 105km
b.3x107m
c. 3.7x 108m
d. There is not enough infonnationto solve thls problem.
17' You are sittingat a baseballgamewhena foul ballcomesin yourdirection.you prepareto catfi it
barehanded.In orderto catchit safely,whichof the followingshouldyou do?
a. Moveyourhendin the dircctionthattheballis moving.
b. Moveyourhandtowardsthe ball.
c. Holdyourhandstill.
18. Whicfiof the followingstrdenb doesmorework?(All of the cartonsureightthe sare.)
a. Julianmoves12cartonsin 7 minutes.
b. Amymoves12cartonsin 5 minutes.
c. Courtniemoves10cartonsin 5 minutes.
d. BothJulianard Amydo ilre Bameamountof work.
19.Whentwo lampsare connectedin a seriesto a battery,the electical resistancein the circuitis
a. morethanthe resistanceof eitherlamp
c. the sameas the resistanceof eitherlamp
_.
b. lessthanthe resistiance
of eitherlamp
d. noneof these
20' Themagneticforceon a curent-canyingwirein a magneticfieldis _
a. oppositeto
b. parallelto
the directionof the cunent.
c. perpendicularto
d. the sameag
21. Theelectriccunentin a hairdryermeasureo11ampo.Theresietance
of thedyeris 20 ohms. Whatis the
voltage?
a.220V
b.210V
c.2Oohms
d.20V
22. Awtre1.46m longcarryinga cunentof 10.0A is at rightangleeto a uniformmagneticfield.Theforceactingon
the wireis 0.60N. Whatis the strengthof the magneticfield?
a. 8.8T
b.0.24T
c . 0 . M 1T
d. 117
NATIE
PERTOD
%
TEST
- Physics-FinalExam
ANSWERSHEET
ilULTfPLECHOICE:Writeyaur answerin CAPITALLETilERSnextto the# for eachquestion.
1.
7.
13.
2,
8.
14.
3.
9,
15.
4.
10.
11.
12.
16.
5.
6.
17.
18.
19.
20.
2 1.
22.
Open Ended:CltooseSIXof the following I questionsto answer
completelyin the spaceprouided. Showyour work Uresignificant digits.
1' A box with a massof 34.0 kg slidesalonga boardthat is at an angleof 34.00' belowthe horizontal.
a. What is the accelerationof the box?
b. \A/hatis the normalforceon the box?
c. Howfastis the boxgoingafter5.2secondsif it startedfromrest?
2. A soccerballis kickedat42'and hasan initialvelocity
of 12.0m/s.
a. Whatis the flighttime?
b. What is the maximumheightthat the baltreaches?
c. Whatis the horizontaldistance
traveled?
3. You throwyour car keysstraightoff of a 14.3m high buildingwith a velocityof 1.4 m/s.
a. Howfar from the baseof the buildingshouldyou lookfor your keys?
b. Howlong does it take for your keysto hit the ground?
c. What is the total velocity(resultantvector)of your keyswfrenthey hit the ground?
4. A toy rocketis shot straightup intothe airwith an initialspeedof OB.9m/s.
a. Howlongdoesit taketherocketto reachits highestpoint?
b. Howhighdoestherocketriseabovetheground?_
c. Howlongwilltherocketbe in the air?
5. A 152kg dog runningat a speedof 3.0 m/sjumps onto a stationaryskateboardthat has a massof 3.6
kg.
a. Whatis the speedof the dog and skateboardtogether?
_
b. Howlong will it take an averageforcewith a magnitudeof 9.0 N to stopthe skateboardand
dog?_
6. A straightwire,47 cm long,is movedstraightup by a forceof 1.2N througha 0.400T mqnetic field
pointedin thehorizontaldirection
tuomtheleftof thispageto the right.
a. what cunent,andin whatdirection,
is inducedin thewire?_
b. Thewireis partof a circuitof totafresistance
of 4.5ohms.Whatis thevoltageof thecircuit?
c. Howmuchpoweris usedby the resistorsin this circuit?
7. A reclargularsolidmeasures
238,o0oumby 1.30dm by 0.00029km.
a. Expressits volumein cm3.
b. Expressits volumein m3.
c. lf the solidhasa densityofT556.t?#Iffiat is its gravitationat
attraction?
8. An elementhasg2 protonsand146neutrons.
a. Whatelementis it, andis it radioactive?
b. lt giveso{ a1o p.article,
anap pffiFiliifrFthree
B particle.
decayequations
betow
andgivethefinalproduc't
herein hyphennotation.
c. Next,it givesdll4 a particles,
ano2'p partictes.Giffi
fin;iffi
in physicist's
notation.