Answer
$T=0.064N$
Work Step by Step
We know that,
$v=\sqrt\frac{T}{\mu}$
This formula can be rearranged and rewritten as:
$T=\mu v^2$
We plug in the known values to obtain:
$T=4\times(40)^2=6400g\frac{cm}{s^2}=0.064N$
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 473: 22g
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