A small motor pulley with a radius of \( 0.050 \text{ m} \) is rotating at \( 1200 \text{ rotations per minute (RPM)} \). The motor pulley is connected by a non-slipping belt to a larger output pulley with a radius of \( 0.20 \text{ m} \). When the motor is turned off, the pulleys slow down with a constant angular acceleration and come to a complete stop in \( 10 \text{ s} \). What is the magnitude of the angular acceleration of the larger output pulley during this time interval?