Fundamentals of Physics Extended (10th Edition)

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

Chapter 16 - Waves-I - Problems - Page 473: 21

Answer

The two pulses meet at $~~x = 2.63~m$

Work Step by Step

We can find the wave speed on the wire: $v = \sqrt{\frac{\tau}{\mu}}$ $v = \sqrt{\frac{250~N}{0.100~kg/10.0~m}}$ $v = 158.1~m/s$ We can find the position of the first pulse at $t = 30~ms$: $x = x_0-vt$ $x = (10.0~m)-(158.1~m/s)(0.0300~s)$ $x = 5.257~m$ After this, the two pulses travel along the wire at the same speed in opposite directions, so they meet at the halfway point of $x = 5.257~m$, which is $x = 2.63~m$ The two pulses meet at $~~x = 2.63~m$
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