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 49P
SSM A sailboat sets out from the U.S. side of Lake Erie for a point on the Canadian side, 90.0 km due north. The sailor, however, ends up 50.0 km due east of the starting point. (a) How far and (b) in what direction must the sailor now sail to reach the original destination?
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Oasis B is 8.0 km due east of oasis A. Starting from oasis A, a camel walks 20 km in a direction 15.0° south of east and thenwalks 30 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?
Oasis B is 9.0 km due east of oasis A. Starting from oasis A, a camel walks 20 km ina 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?
(a)
Units
(a) Number
i
Units
(b) Number
i
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…
Chapter 3 Solutions
Fundamentals of Physics Extended
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