A washing machine, staring from rest, accelerates within 3.14s to a point where it is revolving at a frequency of 2.00 Hz. Its angular acceleration is mostly neer to-

$0.100 \mathrm{rad} / \mathrm{s}^{2}$

$0.637 \mathrm{rad} / \mathrm{s}^{2}$

$2.00 \mathrm{rad} / \mathrm{s}^{2}$

$4.00 \mathrm{rad} / \mathrm{s}^{2}$