Answer
(a) $\hat{j}$
(b) $\hat{j}$
Work Step by Step
(a) $(\hat{i}\times \hat{j})\times \hat{i}= (\hat{k})\times \hat{i}= \hat{j}$
(b) $\hat{i}\times (\hat{j}\times \hat{i})= \hat{i}\times (\hat{-k})= \hat{j}$
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0321740904
ISBN 13:
978-0-32174-090-8
Chapter 12 - Rotation of a Rigid Body - Exercises and Problems - Page 350: 38
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