Two identical Pulses along a String Two identical pulses are moving in opposite

Question

Two identical Pulses along a String Two identical pulses are moving in opposite directions along a stretched string that has one fixed end and the other movable, as shown in the figure. (Figure 1) Above each pulse a green arrow indicates the direction of motion of the pulse. Consider the point where the two pulses start to overlap, point O in the figure. What is the displacement of point O as these pulses interfere? (Figure 2) It varies with time. It remains zero. It depends on the (identical) amplitude of the pulses. It is zero only when the pulses begin to overlap. This question will be shown after you complete previous question(s).

Explanation / Answer

it remains zero..

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