College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 4 - Force and Motion - Learning Path Questions and Exercises - Exercises - Page 139: 68

Answer

$0.0638$

Work Step by Step

$a=\frac{v^{2}-u^{2}}{2S}$ Also, $F=coefficient\,of\,friction\times mg=ma$ Therefore, $Coefficient of friction=\frac{a}{g}=\frac{v^{2}-u^{2}}{2gS}=\frac{25}{2\times20\times9.8}=0.0638$
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