Wave on a string general theory

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SUMMARY

The discussion focuses on the motion of points A-F on a wave traveling along a string. The participant identified points A and D as instantaneously at rest (III), points B and C as moving downward (II), and points E and F as moving upward (I). However, there was confusion regarding the correct classification of points B, C, E, and F, particularly in terms of their upward and downward motion. Additionally, the participant speculated that point C has the greatest acceleration while point F has the least.

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Homework Statement


Screenshot2012-02-22at65311PM.png


The figure shows a wave on a string moving to the right. For each of the points indicated on the string, A-F, state whether it is moving:
I. upward,
II. downward,
III. instantaneously at rest.

Homework Equations


N/A


The Attempt at a Solution


I got A and D as (III), B and C as (II), and E F as (I).

According to the answer, my B-C and E-F is mixed up, but I'm not sure why. How is it moving upward at B? Downward at E? I'm sure I'm just missing something simple.
 
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Also, it asks "In the previous problem, which points have the greatest and least accelerations?"

I'm kinda lost there, but my guess would be C (greatest?) and F (least?)
 

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