Question:
A string of length $40 \mathrm{~cm}$ and weighing $10 \mathrm{~g}$ is attached to a spring at one end and to a fixed wall at the other end. The spring has a spring constant of $160 \mathrm{~N} / \mathrm{m}$ and is stretched by $1.0 \mathrm{~cm}$. If a wave pulse is produced on the string near the wall, how much time will it take to reach the spring?
Solution:
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