3rd Edition

ISBN: 9780321989246

Author: Knight

Publisher: PEARSON CO

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Textbook Question

Chapter P.1, Problem 15P

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

Chapter P.1, Problem 15P, Pulling Out of a Dive Falcons are excellent fliers that can reach very high speeds by diving nearly

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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Chapter P.1, Problem 14P

Chapter P.1, Problem 16P

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