Fundamentals of Physics Extended
10th Edition
ISBN: 9781118230725
Author: David Halliday, Robert Resnick, Jearl Walker
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 3, Problem 5P
A ship sets out to sail to a point 120 km due north. An unexpected storm blows the ship to a point 100 km due east of its starting point, (a) How far and (b) in what direction must it now sail to reach its original destination?
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A jetliner has a cruising air speed of 600 mph relative to theair. How long does it take this plane to fly round-trip fromSan Francisco to Chicago, an east-west flight of 2,000 mi each way,(a) if there is no wind blowing and (b) if the wind is blowing at150 mph from the west to the east?
Oasis B is 9.0km due east of oasis A. Starting from oasis A, a camel walks 20 km in a direction
15.0° south of east and then
walks 34 km due north. If it is to then walk directly to B, (a) how far and (b) in what direction
(relative to the positive x-axis within the range (-180°, 180°]) should it walk?
Gruen data : Distance between A AND B'is d = 9,0 Km
Please Note:
step I
step 2
all the answeRs are
correct,
The vector diagram of displacement of camel is shown below.
A From step 4 (b)
Please explain (Cindetail
Why y ou use the 270°
Qnd - tan () insteod
of ton" )
Theunk jou!
N
R
d2
W-
B
E
C
E
In above figure:
Step 4
d, = 20 km
(а)
d, = 34 km
The distance travelled by the camel to reach the oasis B is:
JBC + DC
DB =
Step 3
(10.318 km ) +(28.823 km )*
= 30.6 km
From geometrical property:
(b) * Explaruthion, Please
BC = AC – AB
= d̟ cos15° - d
= (20 km ) cos15° – 9.0 km 0 = 270° – ZCDB
= 10.318 km
The direction of displacement relative to positive x-axis is
ВС
= 270°- tan
DC
DC = DE - CE…
A Polynesian boater leaving Vanunu wishes to make landfall on an island 210Km directly south. She can paddle at 5.4 Km/Hr (relative to the water) but there is a gentle ocean current flowing 37 degrees east of due south. She compensates for that by pointing her craft at 7.8 degrees west from due south. A) How fast is the current flowing? B) How long (hours) does her journey take?
Chapter 3 Solutions
Fundamentals of Physics Extended
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