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77777
77777
Instructor(s):
Field/Hirschfeld
PHYSICS DEPARTMENT
PHY 2048
Final Exam
April 26, 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.
Where needed use
g
= 9
.
80 m/s
2
1. An elevator is moving upward with constant acceleration. The dashed
curve shows the position y of the ceiling of the elevator as a function
of the time t. At the instant indicated by the intersection of the solid
lines, a bolt breaks loose and drops from the ceiling. Which curve best
represents the position of the bolt as a function of time?
t
y
(1) B
(2) A
(3) C
(4) D
(5) E
2. Three vectors are arranged to form the right triangle as shown in the
diagram (they are also shown separated from the triangle to make clear
their directions). The vector
~
V
3
is equal to:
(1)
~
V
2

~
V
1
(2)
~
V
1

~
V
2
(3)
~
V
1
+
~
V
2
(4)
~
V
1
cos
θ
(5)
~
V
1
cos
θ
3. A man rides a Ferris wheel with a radius of 8.0m that makes 1 revolution every 20 s. When he is at the top, one diameter
above the ground, he releases a ball. How far from the point on the ground directly under the release point does the
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 Summer '08
 Field
 Physics

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