Answer
3.2
Work Step by Step
$C=\sqrt{3.0^{2}+4.0^{2}}=5.0$
and
$\vec{C}+\vec{B}=(5.0)\hat{j}$
Then;
$\vec{B}=(5.0)\hat{j}-\vec{C}$
$\vec{B}=(5.0)\hat{j}-(3.0\hat{i}+4.0\hat{j})$
$\vec{B}=-3.0\hat{i}+\hat{j}$
$B=\sqrt{(-3.0)^{1}+1.0^{2}}=3.2$
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 3 - Vectors - Problems - Page 58: 23
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