Question:
The given figure shows two wave pulses at $t=0$ travelling on a string in opposite direction with the same wave speed 50 $\mathrm{cm} / \mathrm{s}$. Sketch the shape of the string at $\mathrm{t}-4 \mathrm{~ms}, 6 \mathrm{~ms}, 8 \mathrm{~ms}$ and $12 \mathrm{~ms}$.
Solution:
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