Answer
$a = 3.9~m/s^2$
Work Step by Step
We can find magnitude of the braking acceleration:
$mg~\mu_k = ma$
$a = g~\mu_k$
$a = (9.8~m/s^2)(0.40)$
$a = 3.9~m/s^2$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 12 - Equilibrium and Elasticity - Problems - Page 348: 32a
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