University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 10, Problem 10.85P
A 500.0-g bird is flying horizontally at 2.25 m/s, not paying much attention, when it suddenly flies into a stationary vertical bar, hitting it 25.0 cm below the top (Fig. P10.85). The bar is uniform. 0.750 in long, has a mass of 1.50 kg, and is hinged at its base. The collision stuns the bird so that it just drops to the ground afterward (but soon recovers to fly happily away). What is the
Figure P10.85
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A 550.0 g bird is flying horizontally at 2.25 m/s, not paying much attention, when it suddenly flies into a stationary vertical bar, hitting it 25.0 cm below the top. The bar is uniform, 0.700 m long, has a mass of 2.10 kg, and is hinged at its base. The collision stuns the bird so that it just drops to the ground afterward (but soon recovers to fly happily away).
a) What is the angular velocity of the bar just after it is hit by the bird?
b) What is the angular velocity of the bar just as it reaches the ground?
A 550.0 g bird is flying horizontally at 2.50
m/s, not paying much attention, when it
suddenly flies into a stationary vertical bar,
hitting it 25.0 cm below the top.
The bar is uniform, 0.700 m long, has a
mass of 1.50 kg kg, and is hinged at its
base. The collision stuns the bird so that it
just drops to the ground afterward (but soon
recovers to fly happily away).
What is the angular velocity of the bar just
after it is hit by the bird? Express your
answer in radians per second. W1 = rad/s
A 500.0 g bird is flying horizontally at 2.25 m/s, not paying much at-
tention, when it suddenly flies into a stationary vertical bar, hitting it
two-thirds of the way up from the bottom. The bar is uniform and very
thin, is 0.750 m long, has a mass of 1.50 kg, and is hinged at its base.
The collision stuns the bird so that it just drops to the ground afterwards
(but soon recovers and flies away).
a) Using conservation of total angular momentum, determine the angular velocity of the bar just
after it is hit by the bird.
b) What numerical fraction of the bird's initial kinetic energy is converted to other forms of energy
during the collision?
Chapter 10 Solutions
University Physics (14th Edition)
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