77777
77777
Instructor(s):
Mueller/Rinzler
PHYSICS DEPARTMENT
PHY 2048
Final Exam
December 13, 2008
Name (print, last ﬁrst):
Signature:
On my honor, I have neither given nor received unauthorized aid on this examination.
YOUR TEST NUMBER IS THE 5DIGIT NUMBER AT THE TOP OF EACH PAGE.
(1)
Code your test number on your answer sheet (use lines 76–80 on the answer sheet for the 5digit number)
.
Code your name on your answer sheet.
DARKEN CIRCLES COMPLETELY
. Code your UFID number on your
answer sheet.
(2) Print your name on this sheet and sign it also.
(3) Do all scratch work anywhere on this exam that you like.
Circle your answers on the test form.
At the end of the
test, this exam printout is to be turned in. No credit will be given without both answer sheet and printout.
(4)
Blacken the circle of your intended answer completely, using a #2 pencil or blue
or black
ink
. Do not
make any stray marks or some answers may be counted as incorrect.
(5) The answers are rounded oﬀ. Choose the closest to exact. There is no penalty for guessing.
(6)
Hand in the answer sheet separately.
Useful information:
g
= 9
.
80 m/s
2
G
= 6
.
67
×
10

11
Nm
2
/kg
2
M
Earth
= 5
.
98
×
10
24
kg
R
Earth
= 6
.
37
×
10
6
m
M
Sun
= 1
.
99
×
10
30
kg
d
Earth

Sun
= 1
.
5
×
10
11
m
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1. A race car traveling with constant acceleration increases its speed from 10 m/s to 50 m/s over a distance of 60 m. What
is its acceleration?
(1) 20 m/s
2
(2) 8 m/s
2
(3) 12 m/s
2
(4) 16 m/s
2
(5) 40 m/s
2
2. If the ycomponent of a vector
~
A
, in the xy plane, is half as large as the magnitude of the vector, the angle between the
vector and the xaxis is:
(1) 30
◦
(2) 60
◦
(3) 45
◦
(4) 90
◦
(5) 20
◦
3. An object is constrained by a cord to move in a circular path of radius 0.5 m on a horizontal frictionless surface. The
cord will break if its tension exceeds 16 N. The maximum kinetic energy the object can have is:
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 Summer '08
 Field
 Physics, Force, Friction, Mass

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