Reflection and Transmission Waves HW-3 Name 4. At t 0 s, a pulse is moving towar

Question

Reflection and Transmission Waves HW-3 Name 4. At t 0 s, a pulse is moving toward a fixed end of a spring at a speed of I box per second. A small piece of yarn is tied two boxes to the left of the fixed end, as shown in the figure below. speed 1 box/second t=9s a. Describe the position of the piece of yarn during the time intervalt0s tot 9 s. Explain your reasoning-why do you think the yarn moves in this way? b. At what time does the yarn have the greatest positive acceleration? Negative acceleration? (Assume the positive direction is toward the top of the figure.)

Explanation / Answer

A whenever wave get reflected from denser medium then its phase chages by 1800 and in this case wave pulse get reflected from wall hence its phase changes by 1800

B   Its greatest positive acceleration will be just after reflection and its greatest negative acceleration will be just before reflection.

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