Answer
$2.5~s$
Work Step by Step
The required time can be determined as follows:
$v_f=v_i+at$
This can be rearranged as:
$t=\frac{v_f-v_i}{a}$
We plug in the known values to obtain:
$t=\frac{6.5m/s-11m/s}{-1.81m/s^2}$
$t=2.5s$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 2 - One-Dimensional Kinematics - Problems and Conceptual Exercises - Page 50: 38
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