A rope is wound around a linder of mass $3 \;kg$ and radius $40\; cm$. What is the angular acceleration of the cylinder if the rope is pulled with a force of $30\; N$?

Question

$\begin{array}{1 1} (1) 25 m/s^2\\ (2) 0.25\;rad/s^2 \\ (3) 25 rad/s^2\\ (4) 5m/s^2\end{array}$