Answered: You are working as a letter sorter in a…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 5P

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Question

You are working as a letter sorter in a U.S Post Office. Postal
regulations require that employees’ footwear must have
a minimum coefficient of static friction of 0.5 on a specified
tile surface. You are wearing athletic shoes for which
you do not know the coefficient of static friction. In order
to determine the coefficient, you imagine that there is an
emergency and start running across the room. You have a
coworker time you, and find that you can begin at rest and
move 4.23 m in 1.20 s. If you try to move faster than this,
your feet slip. Assuming your acceleration is constant, does
your footwear qualify for the postal regulation?

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