Suppose a mass$-$spring system has the description x$($t$)=5\mathrm{.}50$ cos$(3\mathrm{.}00$t $-1\mathrm{.}40),$ with all units in the MKS system.

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The amplitude is m$,$ the angular frequency is rad$/$s$,$ the phase shift is rad, the frequency is Hz; the period is s$.$