Two particles oscillate in simple harmonic motion along a common straightline segment of length $1\mathrm{.}9$ m $.$ Each particle has a period of $3\mathrm{.}5$ s $,$ but they differ in phase by $\backslash (\backslash$pi $/6\backslash )$ rad. $($a$)$ How far apart are they $1\mathrm{.}0$ s after the lagging particle leaves one end of the path? $($b$)$ Are they then moving in the same direction, toward each other, or away from each other?

$($a$)$ Number

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$($b$)$

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