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PHYS 2305 : Practice Test 1
Please note that the real test will not necessary have the same questions in the practice test. This
practice test is to help you to study for the test. DO NOT assume that there will be the same
questions in the real test.
1. Given
ˆ
ˆˆ
27
2
B
ij
k
=− −
+
G
ˆ
523
Ci
j
k
=
−− −
G
,
the magnitude of

CB
×
G
G
is closest to:
A)
35
B)
43
C)
39
D)
31
E)
27
2. If
ˆ
34
A
ij k
=−+
G
and
ˆ
5
B
xi
j
k
=+
−
G
, find
x
so that
B
G
will be perpendicular to
A
G
.
A)
3
B)
3
C)
5
D)
7
E)
7
3. Over a short interval, starting at time
t
= 0, the coordinate of an automobile in meters is
given by
x
(
t
) = 27
t
+ 4.0
t
3
, where
t
is in seconds. The magnitudes of the initial (at
t
= 0) velocity
and acceleration of the auto respectively are:
A)
0; 12 m/s
2
D)
27 m/s; 12 m/s
2
B)
0; 24 m/s
2
E)
27 m/s; 24 m/s
2
C)
27 m/s; 0
4. A delivery truck leaves a warehouse and travels 2.60 km north.
The truck makes a right
turn and travels 1.33 km east before making another right turn and then travels 1.45 km
south to arrive at its destination.
What is the magnitude and direction of the truck's
displacement from the warehouse?
A)
1.76 km, 40.8° north of east
D)
2.40 km, 45.0° north of east
B)
1.15 km, 59.8° north of east
E)
5.37 km, 49.2° north of east
C)
1.33 km, 30.2° north of east
Use the following to answer questions 58:
During a onehour trip, a small boat travels 80.0 km north and then travels 60.0 km east.
5. What is the boat's displacement for the onehour trip?
A)
20 km
B)
100 km
C)
140 km
D)
280 km
E)
10 000 km
6. What is the boat's average speed during the onehour trip?
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 Spring '08
 TSChang
 Physics

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