2. A bird wants to fly directly from Tree 1 to Tree 2. Tree 2 is 100m to the east (positive x- direction) from Tree 1. The wind is blowing at 4 m/s at an angle of 60° south of west (as shown). The bird can fly at 5 m/s relative to the air. TOP VIEW Vola = 5 m/s 60° va = 4 m/s Tree 1 Tree 2 100 m a. At what angle 0, should the bird fly in order to travel directly between the trees? b. How much time will it take for the bird to fly between trees? c. From the bird's perspective, how far will the bird feel like it flew relative to the air?
2. A bird wants to fly directly from Tree 1 to Tree 2. Tree 2 is 100m to the east (positive x- direction) from Tree 1. The wind is blowing at 4 m/s at an angle of 60° south of west (as shown). The bird can fly at 5 m/s relative to the air. TOP VIEW Vola = 5 m/s 60° va = 4 m/s Tree 1 Tree 2 100 m a. At what angle 0, should the bird fly in order to travel directly between the trees? b. How much time will it take for the bird to fly between trees? c. From the bird's perspective, how far will the bird feel like it flew relative to the air?
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter15: Slope Stability
Section: Chapter Questions
Problem 15.28P
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Transcribed Image Text:2. A bird wants to fly directly from Tree 1 to Tree 2. Tree 2 is 100m to the east (positive x-
direction) from Tree 1. The wind is blowing at 4 m/s at an angle of 60° south of west (as
shown). The bird can fly at 5 m/s relative to the air.
ТОP VIEW
Voja = 5 m/s
0, = ?
60°
Va = 4 m/s
Tree 1
Tree 2
100 m
a. At what angle 0, should the bird fly in order to travel directly between the
trees?
b. How much time will it take for the bird to fly between trees?
c. From the bird's perspective, how far will the bird feel like it flew relative to the
air?
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