Answer
$a=-2.7\times 10^2\frac{m}{s^2}$
Work Step by Step
The angular frequency is given as:
$a=-x{\omega^2}$
We plug in the known values to obtain:
$a=-3.0(3\pi^2)$
$a=-2.7\times 10^2\frac{m}{s^2}$
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