University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 2, Problem 2.88CP
Catching the Bus. A student is running at her top speed of 5.0 m/s to catch a bus, which is stopped at the bus stop. When the student is still 40.0 m from the bus, it starts to pull away, moving with a constant acceleration of 0.170 m/s2. (a) For how much lime and what distance does the student have to run at 5.0 m/s before she overtakes the bus? (b) When she roaches the bus, how fast is the bus traveling? (c) Sketch an x-t graph for both the student and the bus. Take x = 0 at the initial position of the student, (d) The equations you used in part (a) to find the time have a second solution, corresponding to a later time for which the student and bus are again at the same place if they continue their specified motions. Explain the significance of this second solution. How fast is the bus traveling at this point? (e) If the student’s top speed is 3.5 m/s. will she catch the bus? (f) What is the minimum speed the student must have to just catch up with the bus? For what time and w hat distance does she have to run in that case?
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Use the following information to answer the lab based scenario.
A student performed an experiment in an attempt to determine the index of refraction of glass.
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Angle of
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20
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30
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40
26
50
31
60
36
70
38
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Chapter 2 Solutions
University Physics (14th Edition)
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