
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Transcribed Image Text:In researching the forces that act on flying birds, scientists studied the
motion of cockatiels' bodies as they fiy in horizontal flight. As the birds beat
their wings, their bodies move up and down. (Figure 1) shows the vertical
acceleration of a cockatiel's body during one wing beat, consisting of an
upstroke followed by a downstroke.
Part A
If the bird's mass is 82 g. what is the maximum net vertical force exerted on the bird?
Express your answer with the appropriate units.
F= 2,1 N
Submit
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v Correct
Figure
< 1 of 1 >
Part B
a, (m/s?)
50-
The bird is held in level flight due to the force exerted on it by the air as the bird beats its wings. What is the maximum value of this force due to the air? Note that the bird's weight,
the force of gravity acting on it, is calculated using w
mg. a result that will be justified in Chapter 5.
Express your answer with the appropriate units.
t(s)
0.02
0.06 0.08 0.10
HA
?
-50-
(Fair)max =
Value
Upstroke
Downstroke
Submit
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