Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 1, Problem 6P
A surveyor measures the distance across a straight river by the following method (Fig. P1.6). Starting directly across from a tree on the opposite bank, she walks d = 100 m along the riverbank to establish a baseline. Then she sights across to the tree. The angle from her baseline to the tree is 0 = 35.0°. How wide is the river?
Figure P1.6
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71. A commuter airplane starts from an airport and takes the
route shown in Figure P1.71. The plane first flies to city A,
located 175 km away in a direction 30.0° north of east. Next,
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plane flies 190. km due west, to city C. Find the location of
city C relative to the location of the starting point.
t
1
y (km)
250 E
N
C
W
E
200
20.0°
150
R
100
110°
a
50
30.0°
x (km)
50 100 150 200
Figure P1.71
shown in Fig.
resultant displacement by
1.28 for a different approach.)
Figure E1.21
2.6 km
START
800
4.0 km
STOP
3.1 km
45°
1.22. For the vectors A and B Figure E1.22
Fig. E1.22, use a scale drawing
to find the magnitude and direction
of (a) the vector sum A + B and (b)
the vector difference A - B. Use
your answers to find the magnitude
and direction of (c) - A - B and
(d) B-A. (See also Exercise 1.29
for a different approach.)
1.23
A spelunker is surveying
a cave. She follows a passage 180
m straight west, then 210 m in a di-
rection 45° east of south, and then
280 m at 30° east of north. After a
fourth displacement, she finds her-
self back where she started. Use a scale drawing to determine the mag-
nitude and direction of the fourth displacement. (See also Problem 1.57
for a different approach.)
W-E
Ď (10.0 m)
25.0°
Ć (12.0 m)
y
53.00
B (15.0 m)
30.0°
0
X
A (8.00 m)
Section 1.8 Components of Vectors
1.24 Let be the angle that the vector A makes with the +x-
axis, measured…
A commuter airplane starts from an airport and takes theroute shown in Figure P1.71. The plane first flies to city A,located 175 km away in a direction 30.0° north of east. Next,it flies for 150. km 20.0° west of north, to city B. Finally, theplane flies 190. km due west, to city C. Find the location ofcity C relative to the location of the starting point.
Chapter 1 Solutions
Physics for Scientists and Engineers with Modern Physics
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