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PHY 1001-PhysicsI Midterm (^) Exam (^) [,
Name: SocuT^ fD,rJs
Pleasedo all of the-followingproblems.Youare allowedto havea formula and ruler. pleaseshowyour work. shee! calculator
Part I. Multiple choice problems. Eachquestionis worth 4 points.
1' A sledmoveson essentiallyfrictionlessice.It is attachedby a rope (^) to a vertical in the ice.once givena push,the sledmovesaroundthe post post^ set at constantspeedin a circreof radiusR. If the rope (^) breaks, A. (^) the sledwill keepmovingin a_circle. (^) il B.the sledwill mgveon a curvedpath,but not a circre. c. the sledwill follow a curvedpaih ro. a while, ,,---lf^ --=., then (^) movein i ll^ " a straightline.
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fn)the iled^ witt^ movein a straightline.^ K*----,"
2' Btrocks'4 and Care connectedby a string (^) as shown.When released,blockA accelerates the right and block (^) c acceleratesdownward.Thereis friction betweenblocks to not enoughto preventblockB from slipping.If you ^4and^ B but stoodnext to t!9 1aU]eduring (^) rhe rime (^) rhat blockB is slippingon top AblockA, you^ would^ see Qlblock B acceleratingro the righr. B. block,Bacceleratingto the left. !. 11".5D.blockB movingat constantspeedto the left. B movingat constantspeedto the right.
3' A car (massmJmovesat a constantspeedv arounda fla! unbankedcurveof radiusR. A free-bodydiagramfor the car shouldinclude A. an outward (^) centrifugalforceof magnitude mv2/R B. an inward centripetalforce (^) of magnitud,emvz/R C.the force (^) of the car,sacceleration. I.two of the^ above. @rone of the^ above.
4' Now the curvein the Iastproblemhasa bank angleB fmeasuredfrom the horizontal). free-bodydiagramfor the car shouldinclude A. a normal forcethat pointsverticallyupward. ( Br)a-/ (^) ..normal , forcethat points (^) at an angleBfrom the verucat. C.a normal (^) forcethat points (^) at an angleBfrom the horizontal. D.an outward (^) centrifugalforceof magnitude (^) mvz/R. E.more than one of the above.
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V 7 PHY 1001- PhysicsI^ MidtermExamIf Name:
- Threeblocksare^ connectedas^ shown.The^ ropesand^ pulleysare^ of negligiblemass.
lVhen released,block^ Cmovesdownward,block^ B movesup the ramp,and^ blockA moves to the right. After eachblock^ hasmoveda distanced,^ the forceof gravity^ hasdone A. positivework onA,B,and^ C. B. zerowork on A,^ positivework on B,^ and lqgative work on C. ( C."rowork on A, negativework on & and fositive work on C. D.noneof these G. A 6.00-kgblock^ and^ an 8.00-kgblock^ are^ connectedas^ shown.When^ released,the 6.00- kg block acceleratesdownwardand^ the 8.00-kgblock^ 8.00kg aiceleratesto the right.^ After eachblock^ hasmoved2.00cm, the forceof gravitYhasdone A. more work on the 8.00-kgblock^ than^ on the 6'00-kgblock' B. the sameamountof work on both blocks' @t"rt work on^ the 8.00-kgblockthanon the 6'00-kgblock' D. not enoughinformationgivento decide
- Two iceboats(oneof massm,^ one^ of massZmJhold a raceon a frictionless,horizontal,
frozenlake.Both iceboatsstart at rest,and^ the wind exertsthe sameconstantforceon both iceboats.rvvhichiceboatcrossesthe finish^ line with more kinetic energ/ (KE)? A. The^ iceboit of massm: it hastwice as^ much^ KE^ asthe other. B.The iceboatof massm: it has4x as^ much^ KEas^ the other. c. The iceboatof mass2m; ithas twice as^ much^ KEasthe other. D. The iceboatof massZm:ithas^ 4x asmuchKEasthe other. @fn"y both crossthe finish^ line with the sameKE' The graphshowsthe potentialenergyIJ^ for aparticlethat movesalongthe x-axis'The particle-is'A. initially at x = d and movesin the negativex-direction' et which of the labeledx-coordinatesdoesthe particlehavethe greatest speed? A.atx=a fB)"tt=b C.atx=c^ D.atx=d E. mf,re than o--neof the above^ u
- At which of the labeledx-coordinatesis the particle
slowingdown? 6!t""= o^ B.atx = b^ C.atx = c^ D'^ atx = d Y-ot" than^ oneof the^ above
- At which of the labeledx-coordinatesis thete^ zero
force on the Particle? A.atx=aandx=c B.atx=bonly^ C'atx=donly E.misleadingquestion-^ there^ is a forceat all valuesof x. 6.00kg
8.00kg @r,*=bandd
7 YI ,& PHY 1,001,-Ftiy*ies'I x4= xo=o +
MidtennExamE
(^9) ) D.^ + *f'(siu;ts p,w''/ut) (^) ':;" 4 dlu, K, Pt =:^ ol^ lz '
Name: Sou.trt oilS
12;The,engineof a carwith,massm suppliesa eonstanftpowerP,toth,ewheelsto,accelerale 4,cilr;You,canignor,e'friction.andaif resiStance,andthe^ caris initially^ at restat the^ origin. a. (8 points)Showthat the speedof the caris givenby v(t) = (ZPt/m)t/z
)so J= c. (6 points) What is the equationfor the distancetraveled? x-6- j"tn 'k l+" a+ e [++7) =ffaz \l I'a x=
2f yA
a
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PHY 1001* PhysicsI^ Midterm ExamII rr Name: So xrrro,tls
- A 0.100 kg potato is tied to a string with length 2.50 m, and the other end of t}e string
is tied to a rigid suppoft. The potato is held straight out horizontally from the point of suppoft, with the string pulled taut, and then released. a. (10 points)What is the speedof the potatoatthe lowestpoint of its motion? ro (^) Kr + U,cJ.,* =' l{z*Uz
oa
nttl v ,e=^ * mVz Ltrs$?^ Uz=o So Llt l(?r I z "4%Y 1" z M(a V Uz'- t 2g!, =
a 7,oo
*" ll ve tb) (10 points) What is the tension^ in the string at that point? Z F3 (^) 'ro, T-^A<Yn&roa a r rntg * a ,4A.fo,{" \I \ lvn^ l- = {^ilP
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ilwt JL^ s t 0t (aln&) so
-T-_=m(
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=e,Aq!,) 4trc$\Lzso c (^) 3[o,tDD $) p fo
