Fundamentals of Physics Extended
10th Edition
ISBN: 9781118230725
Author: David Halliday, Robert Resnick, Jearl Walker
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 2, Problem 57P
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. It rebounds to a height of 2.00 m. If the ball is in contact with the floor for 12.0 ms, (a) what is the magnitude of its average acceleration during that contact and (b) is the average acceleration up or down?
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An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 9.40 m/s in 4.20 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s velocity after an additional 1.20 s has elapsed?
We investigated a jet landing on an aircraft carrier. In a later maneuver, the jet comes in for a landing on solid ground with a speed of 95 m/s, and its acceleration can have
a maximum magnitude of 7.97 m/s² as it comes to rest.
(a) From the instant the jet touches the runway, what is the minimum time interval needed before it can come to rest?
(b) Can this jet land on a small tropical island airport where the runway is 0.800 km long?
Yes
No
(c) Explain your answer.
When the effect of aerodynamic drag is included, the y-acceleration of a baseball moving vertically upward is au = -g - kv², while the
acceleration when the ball is moving downward is ad = -g + kv², where k is a positive constant and v is the speed in meters per second. If
the ball is thrown upward with an initial speed of 25 m/s, determine the time to from ground to apex and the time to from apex to
ground. Take k to be 0.005 m-¹ and assume that g is constant.
au=-g-kv²
Answers:
tu =
td =
25 m/s
ad=-g+kv²
S
S
h
Chapter 2 Solutions
Fundamentals of Physics Extended
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