Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 3 - Exercises and Problems - Page 48: 56


$\vec{v}= \frac{\sqrt2}{2}\hat{i}-\frac{\sqrt2}{2}\hat{j}$

Work Step by Step

We know that the unit vector has magnitude 1, and we know that the x and y components are equal. Thus, we must find these components: $1 = \sqrt{s^2+s^2} \\ 1 = \sqrt2 s \\ s =\frac{\sqrt2}{2}$ Thus, applying the correct signs, we find: $\vec{v}= \frac{\sqrt2}{2}\hat{i}-\frac{\sqrt2}{2}\hat{j}$
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