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Main Question or Discussion Point
can u describe this motion? how is x > 0 at E? how can we tell the sign of x from the graph?
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"u" wouldn't, but "you" would describe it by looking at the shape  what shape is it? What class of equations gives that shape?can u describe this motion?
x is the displacement  what is the relationship between the displacement and the velocity?how is x > 0 at E? how can we tell the sign of x from the graph?