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Plucked String A string is tightly stretched between the points A-G; forexample

ID: 1750680 • Letter: P

Question

Plucked String

A string is tightly stretched between the points A-G; forexample it could be a guitar string. At point C on the wireyou lightly “pinch” it, and at point B you pluckit. At points D, E, F are very light folded pieces of tissuepaper resting on the string. While the illustration may notshow it exactly, the segments A to B, B to C, C to D, D to E, and Eto G are all equal in length. What happens to the foldedtissue paper at D, E, and F; i.e. do they fall off or“ride” on the wire?

A          B             C                 D                 E                  F                       G

Explanation / Answer

D is an antinode (moves up and down, paper falls off) E is a node (stays still, paper "rides wave") F is a node (moves up and down, paper falls off).
This animation should help illustrate the concept: Standing Wave(wikipedia)