Pulling Out of a Dive
Falcons are excellent fliers that can reach very high speeds by diving nearly straight down. To pull out of such a dive, a falcon extends its wings and flies through a circular are that redirects its motion. The forces on the falcon that control its motion are its weight and an upward lift force-like an airplane- due to the air flowing over its wings. At the bottom of the are, as in Figure 1.3, a falcon can easily achieve an acceleration of 15 m/s2.
FIGURE 1.3
At the bottom of the are, as in Figure 1.3, what is the direction of the net force on the falcon?
Suppose the falcon weighs 8.0 N and is turning with an acceleration of 15 m/s2 at the lowest point of the are. What is the magnitude of the upward lift force at this instant?
A. 8.0 N
B. 12 N
C. 16 N
D. 20 N
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