Figure 16-24a gives a snapshot of a wave traveling in the

Chapter , Problem 3

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Figure 16-24a gives a snapshot of a wave traveling in the direction of positive x along a string under tension. Four string elements are indicated by the lettered points. For each of those elements, determine whether, at the instant of the snapshot, the element is moving upward or downward or is momentarily at rest. (Hint: Imagine the wave as it moves through the four string elements, as if you were watching a video of the wave as it traveled rightward.) Figure 16-24b gives the displacement of a string element located at, say, x = 0 as a function of time. At the lettered times, is the element moving upward or downward or is it momentarily at rest?