Answer
$f=0.959Hz$
Work Step by Step
$f=\frac{1}{2\pi}\sqrt{\frac{k}{m}}$
$F=mg=kx$
$\frac{k}{m}=\frac{g}{x}=\frac{9.8\frac{m}{s^2}}{0.27m}=36.3$
$f=\frac{1}{2\pi}\sqrt{36.3}=0.959Hz$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.