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Unformatted text preview: ‘1) Physics lAa 6—. 4,47. 10'“ W27er
. Final Ego. 9, 2004 RE = 4,“ we M
2 B Prof. Jose Onuchic ME , (00‘ ’02., [:3
A“ CourseCode Number ’ r. ‘ Comments: t .
.232 ' . . MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Gwen releases a rock at rest from the top charmm tower. If g = 9.8 ml 52 and resistance is negligible,
whatisthespeedof  'thitstheground? ‘ A)14m/s ' C)30m/s D)56m/s E)784m/s
\ 2) Awaterrocket, launched from the yound,risesﬁertically with acceleration of30 rn/s2 for l.Oswhen it
. runsoutof'hrel".Disregardingairresistan at. willtherocketrise?
.’ A)15m _V~B)31m D)91m E)120m K 3) Norma rekases a bowling from rest; it rolls own a ramp with constant acceleration. After half a
‘5‘! m. it hastraVeled 0.75 m. How far has it traveled after two seconds?
B) 1.2 m C) 4.7 m D) 9.0 m E) 8.2 m '4) Vector A is 3.0 units in length and points along the positive xaxis; vector B is 4.0 units in length and
\ points along a direction 150°£mm the Rositive x—axis. What is the direction of the resultant with respect to
‘ I} L“.\ 7 thepositive xaxis? : ; ,
V'f.’ A)77° B) 13°  C) 86° D) 150° 5) A baseball thrown from the outﬁeld is released from shoulder height at an initial velocity of 29.4 ml 5 at an angle of 30.0 with respect to the horizontal What is the maadmum vertical displacement that the ball ' 1A '_ ilB trajectory?
Jaglwmﬂfw B) 9.80 m C) 22.1 m D) 44.1 m E) 16.2 an
inn Shout 0 ' 6) Astoneisthrownwithaninitial speed of15 m/s atanangleof53°abovethehorizontalfromthetop ofa 35 m If g = 9.8 m/ 52 and air resistance is negligible, then what is the magnitude of the horizontal
component of velocity as the rock strikes the 1   _ A) 7.5 m/s B) 12 m/s .\I D) 29 m/s E) 18 m/s Al Three blocks, connecting ropes, and a light irictionless pulley comprise a system. as shown. An extemal force P is applied
downward on block A. The system accelerates at the rate of 7.5 m/ 52. The tension in the rope connecting block B and blockCequalséON.Recallthat the tensionondifferent ropesisdifferent.
7) Biligurel,theextemalforoePisclosesttoz A) 170N B) ZION C)250N D)2.30N B)260N cmoN 7 D)320N 9) A man pulls a sled at a constant velocity across a horizontal snow surface. If {force of 80 N is being
appliedtothesledropeatanangle of53 °tothe ground,whatis theforoeofﬁ'lctionbetweensledand snow? .
AMON B)80N C)48N D)64N 10) A uapezearﬁsnwiﬁtswing,weighs soo N;heis momentarily held bonesidebyhis‘parlmrso thatthe
swing ropes make an angle of 300° with the vertical. In such a condition of static equilibrium, what is the horizontal force being applied by the partner? .
A)924N B)400N C) 19w @ _ wow 11) A 100—kgboxisplaced onaramp. As oneend of the ramp israised,theboxbegins tomovedownwardjust
as the angle of inclinati 15° . What is the coefﬁcient of static friction between box and ramp? I,
\'. A) 0.15 C) 0.50 D) 0.77' 100.95 12) Find the batsion in an elevator cable if the 1 (DOkg elevator is descending with an acceleration of 1.8 ml 32, downward. . ,
A)5700N B)8000N C)9800N D)11600N E)13900N 13) A simple pendulum. 1.00 m in length, is released from rest when the support string is at an angle of 35.0 °
fromthevertical. Whatisthespeedofthesuspendedmassatthe bottomofthe swing? (Ignoreair  = 9.80 III/52) ’
B) 0.67 m/s C) 1.33 ml 5 D) 0.94 m/s 14) A 10.0kg box starts at rest and slides 3.5 m down a ramp inclined at an angle of 10° with the horizontal. If
there is no friction betWeen the ramp surface and crate, what is the velocity of the crate at the bottom of the ; = 9.3 m/sZ) B) 4.2 m/s C) 6.1 m/s D) 8.3 m/s E) 10.7 rule 15) An amount of workequal to 1.5] is required to compress the spring in a Springgtm. What is the "launch speed" of a 15g marble? .
A)12m/s C) 15m/s D) 18m/s E)21m/s AZ 16) A baseball catcher puts on an exhibition by catching a 0.150kg ball dropped from a helicopter at a height
of 100 m above the catcher. If the catcher "gives" with the ball for a distance of 0.750 in while catching it, what average force is exerted on the mitt by _ all? ; = 9.80 ml 52)
A)78N B)119N 6m D)294N E)392N 17) A railroad freight car, mass 15 000 kg, is allowed to coast alonga level track ata speed of2.0 ln/s. It
collides and couples with a 50 DODkg loaded second car, initially at rest and with brakes released. What
percentage of the initial kinetic energy of the 15 GOOkg car is preserved in the two coupled cars after collision?
A) 86% B) 100% D) 14% 18) Alex throws a 0.15kg rubber ball down onto the ﬂoor. The ball's speed just before impact is 6.5 mls, and
justafterisasm/s. : ' . changeinthemagnitudeofdreball‘smomentum?
A) 0.09 kg.m/ s C) 4.3 kgm/s D) 10.0 kgml s E) 126 kg.rn/ s
19) 7. A 7.0kg bowling ball strikes a 20kg pin. The pin ﬂies forward with a velocity of 6.0 m/ s; the ball
continues forward at as the original velocity of the ball?
I ‘ . D 5. .6
A)4.1m/s «(mp C)33m/s ) Omls E)6 m/d 20) No identical 7kg bowling balls roll toward each other. The one on the left ia'rhoving at +4 ml s while the
one on the right is moving at 4 ml 8. How fast is each ball moving after they collide elastically?
A Neitherismoving. ‘
C +4 m/s, —4 ml 5
D) 14 m/s, 14 m/s
B) +14 ml 5, 14 ml 5 21) At a given point above the surface of the earth, the gravitational acceleration is equal to 9.0 m/sz. The altitude of this point, above the surface of the earth. in km. is closest to: r‘ \
A) 1200 B) 820 C) 400 D) 560 k Situation 1
A 4.0 kg solid sphere, made of metal whose density is 3000 kg/ m3, is suspended by a core. The density of water is 1000 kg/m3.
2) InSituaﬁon1,whenthesphereisimme .w =" a tensionintheoordisclosest to: A)30N B)27N \ D)29N mzeN 23) A satellite is in a circular orbit about the Earth at a distance of one Earth radius above the surface. What is the velocity of the satellite? (The radius of the Earth is 6.4 x 106 at and C: 6.67 f
A) 2,800 m/s B) 4,200 m/s . C) 16,800 m/s 24) An 80kg man is one fourth of the way up a 10rn ladder. that is resting against a smooth, frictionless wall. [ftheladderhasamassonOkgand itmakesanangle Ofﬁoowilhtheground,ﬁndfheforceofﬁicﬁonof
the ground on the foot of the ladda'. . ' A)780N B)340N D)85N E)4ON kgatx=0m, and amassofmass 120kgatpositionx=4m1hepositionoftheoenterofmassisatthe
following value of x . ' . A)0m B)1m D)2m E)2m ...
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 Spring '10
 Smith
 Acceleration, m/s, Bowling ball, AMON B

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