Answer
$0.2$ m/s
Work Step by Step
The equation follows the form of $y(x,t)=Af(kx-\omega t)$. Therefore, speed can be found using $$\omega=kv$$ $$v=\frac{\omega}{k}=\frac{4.0s^{-1}}{20 m^{-1}}=0.2m/s$$
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 16 - Waves-I - Problems - Page 474: 29
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