4) A boat starting from point A takes 30 seconds to reach point B on the opposite bank of a river. The heading of the boat is 15° north of east as shown. If it is assumed that the velocity of water is in ± y direction, what is the velocity of the boat relative to the water and the water speed and sense? The distance between points A and B is 120 m in the x and 60 m in the y direction; i.e., the position vector from A to B, TAB = 120î + 60ĵ meters. ANS. VB/W =4.14 m/s, Vw = 0.93 m/s A B 15°

4) A boat starting from point A takes 30 seconds to reach point B on the opposite bank of a river. The heading of the boat is 15° north of east as shown. If it is assumed that the velocity of water is in ± y direction, what is the velocity of the boat relative to the water and the water speed and sense? The distance between points A and B is 120 m in the x and 60 m in the y direction; i.e., the position vector from A to B, TAB = 120î + 60ĵ meters. ANS. VB/W =4.14 m/s, Vw = 0.93 m/s A B 15°

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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4)
A boat starting from point A takes 30 seconds to reach point B on the opposite bank of a river.
The heading of the boat is 15° north of east as shown. If it is assumed that the
velocity of water is in ± y direction, what is the velocity of the boat relative to
the water and the water speed and sense? The distance between points A and B
is 120 m in the x and 60 m in the y direction; i.e., the position vector from A to
B, TAB = 120î + 60ĵ meters.
ANS.
VB/w =4.14 m/s, Vw = 0.93 m/s
A
N
B
15°

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