Answer
4 m
Work Step by Step
$W=0 \implies \vec{F}\cdot\vec{d}=0$
$\implies F_{x}d_{x}+F_{y}d_{y}+F_{z}d_{z}=0$
$\implies(2\,N\times8\,m)+(-4\,N\times c)+(0\times0)=0$
$\implies 16\,J=4\,N\times c$
Or $c=\frac{16\,J}{4\,N}=4\,m$
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 7 - Kinetic Energy and Work - Problems - Page 176: 74a
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