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Unformatted text preview: Physics 123  Analytical Physics m SECOND
COMMON HOUR EXAM
Monday, November 12, 2007
Professor Marley and Mr. Lucido Your name sticker with exam code. SIGN HERE: The exam Will last from 9:40  11:00 pm. Use a #2 pencil to make
entries on the answer sheet. Enter the following ID information
now, before the exam starts. In the section labelled NAME (Last, First, Ml.) enter your last
name, then ﬁll in the empty circle for a blank, then enter your
ﬁrst name, another blank, and ﬁnally your middle initial. Under STUDENT # enter your 9—digit Social Security Number. Enter 123 under COURSE, and your section number (see label above) under SEC. Under CODE enter the exam code given above, During the exam, you may use pencils, a calculator, and one 8.5
x 11 inch sheet (both sides) with formulas and notes, There are 16 multiplechoice questions on the exam. For each
question, mark only one answer on the answer sheet. T here is
no deduction of points for an incorrect answer, so even if you
cannot work out the answer to a question, you should make an
educated guess. At the end of the exam, hand in the answer SOLO! 770M: 10. sheet and the cover page. Retain this question paper for future
reference and study. When you are asked to open the exam, make sure that your copy
contains all 15 questions. Raise your hand if this is not the case, and a. proctor will help you. Also raise your hand (luring the exam
if you have a question. Please SIGN the cover sheet under your name sticker and have
your student ID ready to show to the proctor during the exam.
Some possible useful information g z 9.80 III/52 l. "P A 5.0 kg object is suspended by a string from the ceiling of an o. elevator that is accelerating donmward at 2.6 m/s2. “That is the
tension in the string? 52N
36N
62N
13N
49N How much work is done by a person lifting a 2.0»kg object from the bottom of a well at a constant Speed of 2.0 m/s for 5.0 s? 5 ‘ 0.27 id
0.24 M L
0.22 kJ
0.20 kg
0.31 k3 A carnival Ferris wheel has a 15111 radius and completes five turns
about its horizontal axis every minute. “(hat is the force of the
seat on a 50 kg passenger at his iowest point during the ride? 700 N upward
400 N upward
210 downward
290 N downward
210 N upward . boﬁct‘w. . f‘ﬁ __ I r ..._..o :3 0 hr).—"
An ailterrain vehicle 0 00 kg mes moves up a 10.0 slope at a a
constant velocity of 6.00 m/s. The rate of change of grax‘itational
potential energy with time is: ' "‘ 5.25 kVV.
439 kW
118 kW.
30.4 kW.
24.8 kW. )iv . A book is placed on a chair which is standing on the ﬂoor. A
videocassette is piaced on the book. The floor exerts a normal
force: only on the chair. upwards on the chair and downwards on the book. on all three. only on the objects that you have deﬁned to be part of the
system. only on the book. When a certain spring is stretched to a distance of 5.0 m from
its equilibrium position, the force required to stretch the spring is
10 N. W’hat is the amount of work that is done in stretching the
spring this 5.0 m? 0 J
500 J
25 .1
250 J
50 J A mass of 3 kg is placed on an 8 kg mass which lies on a horizontal,
frictionless table. What is the masdmum acceleration, in In/sz‘,
that can be achieved due to force F applied horizontally to the
3 kg mass so that the whole system accelerates without the 3 kg
mass sliding on the 8 kg mass. The coefﬁcient of static friction between them is 0.5. w , a.
\ 1 3 I‘ﬁ ._ r‘ 1.5 1.8
1.1 0.9 F 8. A glider of mass 4.0 kg is placed on a horizontal airtrack and 11. You throwarock weighing 10.0 N vertically in the air fromground
connected by a light, inextensible string over a frictionless pulley level. When the rock is at a height of 20.0 m, the velocity is
to a, hanging 1.0 kg mass. both staiting f1on1 rest. The coeﬂicient upwards at 15.0 mfs. What is the initial kinetic energy?
of kinetic friction is O. 10 How longﬂoes it take the 1.0 kg mass to 110 J " "
fall 1 0 m? 0"“ 5 85 J 1 3 s . 315 J
16 s 1330 J
0.8 s 1190 .1
1.0 s 1.8 s .12. A 1800 kg" Corvette is travelling at a epei'adAof 50.0 111/ s. What is ' . 1 .  __ . , _... the magnitude of the force required to bring it to a stop in 75.0
9. A particie moves at constant speed'in’a c1rciil‘erfnathf The instan— In?
taneous velocity and instantaneous acceleration vectoas are. 30.0 icN
none of the above 69.0 kN
both perpendicular to the circular path 0.600 kN
opposite to each other 9.00 kN
both tangent to the circular path 60.0 kN perpendicular to each other
13. A 1500 kg ear is held by a cable on 'a smooth 18.11:? at; an angle 10. A 20kg block slides on a rough horizontal surface. A force (P of 45" above the horizontal while the cabie is at an angle of 30°
= 6.0 N) is applied to the block as Show. The magnitude of above the inclined lane, (see ﬁgure at the end of the exam). Find
the block’s acceleration is 1.2 III/82 to the right. What is the the marmai (P
magnitude of the force of friction acting on the block? » 14700 N P  5260 N
10400 N
3.4 N 7670 N ‘
1.6 N I F 4390 N
2.0 N . ... .5 0 W3 3“
if: g 14. What angle does the vector :51 :ﬁ—lﬁ make With the
' positive 2 axis?
649"
34.5°
25.1”
555°
4.5.0" 15. A student is sitting on the right side of a. school bus when it makes
a. right turn. We know that the force of gravity acts downwards
and a. normal force from the seat acts upwards. If the student stays in place when the bus turns, we also know that there must.
be a force on the student pareliel to the seat in a direction
between forward and left on the student. no other force on the student. a force on the student parallel to the seat directed to the
ieft on the student. a. force on the student parallel to the seat directed to the
right on the student. a force on the student parallel to the seat directed forward
on the student. ...
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 Fall '07
 Bartynsky

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