Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 4 - Motion in Two and Three Dimensions - Problems - Page 84: 4c

Answer

$20$ cm

Work Step by Step

(c) Using the same coordinate system$ defined in part (a)$, the hand starts pointing towards -y... The initial position of the hand is now : $ \quad\vec{r_{1}}=(-10cm)\hat{j} $ and the final position:$ \quad\vec{r_{2}}=(10cm)\hat{j}$, $\Delta\vec{r}=(10cm)\hat{j}-(-10cm)\hat{j}=(20cm)\hat{j}$ $|\Delta\vec{r}|=20$ cm (two radii)
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