A coin placed on a rotating table just slips when it is placed at a distance of \( 1 \, \text{cm} \) from the center. If the angular velocity of the table in halved, it will just slip when placed at a distance of _______ from the centre.
\( 4 \, \text{cm} \)
\( 1 \, \text{cm} \)
\( 2 \, \text{cm} \)
\( 8 \, \text{cm} \)
