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An upright square pulse and an inverted triangular pulse were directed toward each other on a spring, as shown in the illustration. Sketch the appearance of the spring at the instant the two pulses met and completely overlapped. What principle did you use in constructing the shape of the spring for the instant at which the two pulses met? What does this principle state about how waves combine?

i couldnt get the picture in but i think the questions explain it enough

I am assuming the triangle and the square have the same base and height length. I know a triangle is bh\2. Therefore it is smaller than the square. Does this mean the sqaure takes over the triangle like this:

a small square above the string.

What principle is this

thanks

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# Homework Help: Destructive Interference with Different Wave Shapes

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