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Physics 111 Honors
Final Exam
Fall 2002
Name:
Section:
Closed book exam. Only one 8
.
5
00
×
11
00
formula sheet (front and back side) can be used. Calculators are
allowed. Use the scantron forms (pencil only!) for the multiple choice problems. Circle the answers on the
examination sheet as well, and return it together with the scantron form. Use the back of these pages, or
attach your own pages with solutions for problems which require calculations.
The multiplechoice problems are 5 points each. Partial credit (up to 3 points) will be given for multiple
choice problems, if you provide a detailed solution on the examination sheets. The workout problems are
10 points each. Up to 5 points of extra credit will be given for a clear and legible presentation of your
results. The nominal number of points is 100.
Clearly print your ﬁrst and last name and indicate your section number on both the scantron form and the
examination sheet.
Good luck!
MultipleChoice Problems
Problem 1:
The neutron star PSR 1937
+
21 rotates once every 1.557 806 ms. How many times does it
rotate in 7.00 days?
A)
1
.
35
×
10
5
B)
2
.
25
×
10
5
C)
5
.
65
×
10
6
D)
1
.
35
×
10
8
E)
3
.
88
×
10
8
Problem 2:
A car travelling 62.0 km/h is 23.0 m from a barrier when the driver slams on the brakes. The
car hits the barrier 2.25 s later. Assume that the acceleration of the car is constant. How fast is the car
travelling at impact?
A)
3.22 m/s
B)
7.25 m/s
C)
7.65 m/s
D)
10.2 m/s
E)
12.8 m/s
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For men’s volleyball the top of the net is 2.43 m above the ﬂoor and the court measures 9.00 m
×
9.00 m on each side of the net. Using a jump serve, a player strikes the ball at a point that is 3.33 m above
the ﬂoor and a horizontal distance of 7.62 m from the net. Assume that the initial velocity is horizontal,
what is the range for the initial velocity to clear the net and to strike the ﬂoor inside the back line on the
other side of the net?
A)
15
.
3
m
s
≤
v
0
≤
17
.
8
m
s
B)
15
.
3
m
s
≤
v
0
≤
25
.
2
m
s
C)
17
.
8
m
s
≤
v
0
≤
20
.
2
m
s
D)
17
.
8
m
s
≤
v
0
≤
25
.
2
m
s
E)
25
.
2
m
s
≤
v
0
≤
28
.
5
m
s
Problem 4:
A block of weight 125 N hangs from a cord tied to two other cords fastened to a support. The
upper cords make angles of
θ
1
=
28
◦
and
2
=
47
◦
with the horizontal. Find the tension
T
1
in Cord 1!
125 N
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This note was uploaded on 05/02/2011 for the course PHYSICS 111 taught by Professor Wang during the Spring '09 term at NJIT.
 Spring '09
 WANG
 Physics

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