Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 11 - Oscillations and Waves - Problems - Page 324: 40

Answer

It will take a pulse 0.21 seconds to travel from one support to the other.

Work Step by Step

We can find the speed $v$ of the pulse as: $v = \sqrt{\frac{F_T}{\mu}}$ $v = \sqrt{\frac{F_T}{m/L}}$ $v = \sqrt{\frac{120~N}{0.65~kg/8.0~m}}$ $v = 38.43~m/s$ We can find the time $t$ for a pulse to travel a distance of 8.0 meters as: $t = \frac{L}{v}$ $t = \frac{8.0~m}{38.43~m/s}$ $t = 0.21~s$ It will take a pulse 0.21 seconds to travel from one support to the other.
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