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Question
A string is fixed on both sides. It is snapped from both ends at the same time by applying an equal force. What happens to the shape of the waves generated in the string? Also, will you observe an overlap of waves?
Question by OpenStax is licensed under CC BY 4.0.
Final Answer

Please see the solution video, which shows that the wave pulses interfere when they are in the same position, but then continue afterwards, looking and moving the same as they would have without the previous interference.

Solution Video

OpenStax College Physics Solution, Chapter 16, Problem 27 (Test Prep for AP® Courses) (1:18)

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Video Transcript
This is College Physics Answers with Shaun Dychko. There's a string affixed at both ends and both ends are snapped with the same force, which means they will each have a wave pulse of the same amplitude created. And then this pulse is going to travel to the right here. And it's going to travel, this side is going to travel to the left and they will travel towards each other. And then when they overlap in the middle, the principle of super position says that the resultant wave will be the sum of their amplitudes. And so if this has an amplitude a and this one has an amplitude a, as well. Then, the amplitude of their sound will be two a. And so this is meant to be higher. And then afterwards the waves will continue. And this wave here or this pulse here continues along and continues to go to the right. And it is unaffected by the fact that it encountered the other wave pulse here. It still looks the same now. It's the original size that it was before. And it's continuing in the original direction. And likewise for this pulse here. And then, they'll bounce off the ends and then, do this over again, as well.