College Physics: A Strategic Approach Technology Update, Books a la Carte Plus Mastering Physics with Pearson eText -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780134201979
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Textbook Question
Chapter P.1, Problem 16P
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?
A falcon starts from rest, does a free-fall dive from a height of 30 m, and then pulls out by flying in a circular are of radius 50 m. Which segment of the motion has a higher acceleration?
A. The free-fall dive
B. The circular are
C. The two accelerations are equal.
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Figure 27-65 Problem 63.
Thor flies by spinning his hammer really fast from a leather strap at the end of the handle, letting go, then grabbing it and having it pull him. If Thor wants to reach escape velocity (velocity needed to leave Earth’s atmosphere), he will need the linear velocity of the center of mass of the hammer to be 11,200 m/s. Thor's escape velocity is 33532.9 rad/s, the angular velocity is 8055.5 rad/s^2. While the hammer is spinning at its maximum speed what impossibly large tension does the leather strap, which the hammer is spinning by, exert when the hammer is at its lowest point? the hammer has a total mass of 20.0kg.
Chapter P Solutions
College Physics: A Strategic Approach Technology Update, Books a la Carte Plus Mastering Physics with Pearson eText -- Access Card Package (3rd Edition)
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