Question: One end of a horizontal string that has a linear mass density of (3.5 mathrm{~kg} / mathrm{m}) is displaced vertically at a speed of (45

One end of a horizontal string that has a linear mass density of $3.5 \mathrm{~kg} / \mathrm{m}$ is displaced vertically at a speed of $45 \mathrm{~m} / \mathrm{s}$ for $6.7 \mathrm{~ms}$. The pulse created by this motion travels down the string at $78 \mathrm{~m} / \mathrm{s}$. How much kinetic energy travels along the string?

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