4. A torque is applied to a long thin rod making it rotate with an angular acceleration of 5.25 rad/s about an axis through its center and perpendicular to its length (see figure (a) below). If the same torque is now applied to make the rod rotate about an axis about one end perpendicular to its length (see figure (b) below), determine the new angular acceleration of the rod. rad/s A axis axis (a) (b)