Angular Speed
$\omega = 2 ~ \dfrac{\text{rev}}{\text{sec}} \cdot \dfrac{2\pi ~ \text{rad}}{\text{rev}} = 4\pi ~ \text{rad/sec}$
Linear Speed
$v = r\omega = 0.6(4\pi) = 2.4\pi ~ \text{m/sec}$
Centripetal Acceleration
$a_c = \dfrac{v^2}{r} = \dfrac{(2.4\pi)^2}{0.6}$
$a_c = 94.79 ~ \text{m/sec}^2$ ← answer
