Name_____________________________________________
Exam #3
Physics I
Fall 2002
If you would like to get credit for having taken this exam, we need
your name above and section number below.
Section #
_____ 1
_____ 2
_____ 3
_____10
_____ 8
_____ 5
_____ 6
_____ 7
M/TH 8-10 (Bedrosian)
M/TH 10-12 (Hayes)
M/Th 12-2 (Hayes)
M/Th 12-2 (Sperber)
M/Th 2-4 (Schroeder)
Tu/F 10-12 (Bedrosian)
Tu/F 12-2 (Sperber)
Tu/F 2-4 (Sperber)
If we catch you cheating on this exam,
you will be given an F in the course.
Questions
Part A
Value
16
B-1,2
12
B-3,4
12
B-5,6,7
14
C-1
8
C-2
24
C-3
10
C-4
4
Total
100
Score
Sharing information about this exam with people
who have not yet taken it is considered cheating
on the exam for both parties involved.
The Formula Sheets are the last two pages. Detach carefully for easier reference if you wish.
Name_____________________________________________
On this exam, please neglect any relativistic and/or quantum mechanical effects. If you don’t
know what those are, don’t worry, we are neglecting them! On all multiple choice questions,
choose the best answer in the context of what we have learned in Physics I. On numerical
questions, show all work to receive credit.
Part A – Warm-Ups – 16 Points Total (4 at 4 Points Each)
Write your choice on the line to the left of the question number.
_______1.
A)
B)
C)
D)
E)
_______2.
A)
B)
C)
D)
E)
_______3.
A)
B)
C)
D)
E)
_______4.
A)
B)
C)
D)
E)
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Part B – Short Problems – 38 Points Total (5 at 6 Pts. + 2 at 4 Pts.)
Show all work.
B-1 (6 Points)
Calculate ...
Answer: _____________________ units ________
B-2 (6 Points)
…?
Answer: _____________________ units ________
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B-3 (6 Points)
…?
Answer: _____________________ units ________
B-4 (6 Points)
…?
Answer: _____________________ units ________
Name_____________________________________________
B-5 (6 Points)
…?
(
Answer: _____________________ units ________
Follow-Up Multiple Choice Questions (2 at 4 Points Each):
Write your choice on the line to the left of the question number.
______B-6. In B-3, ?
A)
B)
C)
D)
E)
F)
______B-7. In B-4, ?
A)
B)
C)
D)
E)
F)
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Part C – Extended Problem
This section contains numerical problems and one follow-up multiple-choice question.
C-1 (8 points)
_________________________ units ________
_________________________ units ________
Name_____________________________________________
C-2 (24 points)
___________________ units ________
___________________ units ________
Name_____________________________________________
C-3 (10 points)
___________________ units ________
Follow-Up Multiple Choice Question (1 at 4 Points):
Write your choice on the line to the left of the question number.
______C-4.
A)
B)
C)
Name_____________________________________________
Formula Sheet for Exam 3 and Final – Page 1 of 2
1.
v  v 0  a t  t 0 
21.
2.
x  x 0  v 0 ( t  t 0 )  12 a ( t  t 0 ) 2
K  12 m v 2  12 m (v x  v y )
22.
3.
x  x 0  12 ( v0  v)( t  t 0 )
23.
K f  K i  Wnet


U    Fcons  dx
4.
x  x 0  v( t  t 0 )  12 a ( t  t 0 ) 2
24.
U g  m g (y  y 0 )
25.
U s  12 k ( x  x 0 ) 2
26.
27.
28.
 K   U  Wnoncons
s  r
v tangential   r
a tangential   r
2
2
6.
v 2  v 02  2a x  x 0 
 

 F  Fnet  m a
7.
T
8.
a centripetal 
29.
30.
  0  t  t 0 
Fcentripetal


p  mv

 
dp
 F  Fnet  d t



J   F dt   p


P   pi


dP
  Fext
dt
31.
   0  0 ( t  t 0 )  12 ( t  t 0 ) 2
32.
   0  12 (0  )( t  t 0 )
33.
   0  ( t  t 0 )  12 ( t  t 0 ) 2
M   mi
38.
5.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
2r
v
v2
 2 r
r
v2
m
 m 2 r
r
1
1
x cm   m i x i y cm   m i y i
M
M


P  M v cm
   
a  b  a b cos()  a x b x  a y b y
 
W  Fd
 
W   F  dx
35.
 2  02  2   0 
   
a  b  a b sin( )
36.
I   m i ri
34.
37.
39.
40.
41.
42.
43.
44x. m1 v1, x ,before  m 2 v 2, x ,before  m1 v1, x ,after  m 2 v 2, x ,after
44y. m1 v1, y ,before  m 2 v 2, y ,before  m1 v1, y ,after  m 2 v 2, y,after
m1  m 2
2 m2
v1,i 
v 2 ,i
m1  m 2
m1  m 2
2 m1
m  m1

v1,i  2
v 2 ,i
m1  m 2
m1  m 2
45a. v1,f 
45b. v 2,f
2
K rot  12 I  2
 
W     d
  
  r F

 dL

  I  d t
  
l  r p


L  l i


L  I
Name_____________________________________________
Formula Sheet for Exam 3 and Final – Page 2 of 2
46.
47.
48.
49.
50.
51.

m m
F  G 1 2 2 r̂
r

1 q1 q 2
F
r̂
4  0 r 2

1 qi
E  
r̂i
4   0 ri 2


F  qE
1 qi
V
4   0 ri
U  qV
52.
 
V    E  dx
dV
dx
dV
53y. E y  
dy

 
54. F  q v  B
mv
55. r 
qB
53x. E x  
Useful Constants
(You can use the approximate values on tests.)
Universal Gravitation Constant
G  6.67310 11 N m 2 kg 2  6.7 10 11
Electrostatic Force Constant
1
 8.98755 10 9 N m 2 C  2  9.0 10 9
4  0
Magnetic Constant
 0  4  10 7 H m 1  1.26 10 6
Speed of Light in Vacuum
c  2.99792458 10 8 m s 1  3.0 10 8
Charge of a Proton
e  1.60217646 10 19 C  1.6 10 19
Electron-Volt Conversion Constant
1eV  1.60217646 10 19 J  1.6 10 19
Mass of a Proton
m p  1.6725210 27 kg  1.67 10 27
Mass of an Electron
m e  9.109110 31 kg  9.110 31